Please select the most similar patent number from A, B, C and D. Which number is?
The present invention provides a large-circulating cell retention apparatus, a fluid circulation pump, and a down-detection shaker. The present invention belongs to the technical field of cell retention apparatuses. The down-detection shaker comprises a shaker body; a shaking disc at the top of the shaker body is mounted on an upper bearing plate; four corners of the upper bearing plate are respectively mounted at the upper ends of four down-detection columns; a column fixing frame is mounted in the middles of the four down-detection columns; the lower ends of the four down-detection columns are respectively mounted on a shaking disc bottom plate; sliding sleeves and sleeve locking screws are mounted on the shaking disc bottom plate; the sleeve locking screw is mounted on the outer side of the center line of the sliding sleeve; the sliding sleeve is slidably provided with an openable heat preservation tank. The fluid circulation pump comprises a double-layer hard plastic shaking tank, a stirring tank and the down-detection shaker. The large-circulating cell retention apparatus comprises a supernatant extraction and backwashing system and the fluid circulation pump.
A: Disclosed is a metal component grinding device with a positioning function. The grinding device comprises a housing (6), a moving base (10) and support legs (7). A threaded sleeve (1101) is rotatably mounted inside the housing by means of a threaded rod (11). The top of the housing is provided with an adjustment groove (601). The moving base (10), which extends out of the adjustment groove, is mounted at the top of the threaded sleeve by means of fixing rods (1103). A moving platform (9) is mounted on the moving base in a sliding manner by means of a slide groove. Two support posts (1) are fixedly mounted at the top of the moving platform. Chucks (104) are respectively mounted on outer sides of the support posts in a penetrating manner by means of threaded adjustment knobs (103) and adjustment discs (105). An upright post (5) is fixedly mounted on one side of the top of the housing. An electric motor (3) is fixedly mounted at the top of the upright post by means of a pedestal (4). The device moves left and right by means of mounting a moving assembly inside the housing and by means of using the threaded rod with the threaded sleeve and the moving base, and by means of mounting the chucks, which are adjustable, between the support posts, a component can overturn using the adjustment discs while the component is fixed.
B: A hydraulic press machine for a fiber-reinforced plastic product. Columns (2) are mounted at four corners of a worktable (4). The tops of front and rear rows of columns are respectively connected to each other by means of upper cross beams (1) extending along left and right directions. Pull rods (10) are respectively inserted into the front part and the rear part of each column. The upper ends of the pull rods respectively penetrate through the tops of the upper cross beams and are fixed onto the upper cross beams by means of upper nuts. The lower ends of the pull rods respectively penetrate through the bottom of the worktable and are fixed onto the worktable by means of lower nuts. Intermediate cylinders (5) are respectively mounted in the intermediate parts of the upper cross beams. Side cylinders (6) are symmetrically mounted on left and right sides of the intermediate cylinders, respectively. Lower ends of plungers of the intermediate cylinders and the side cylinders are all fixedly connected to the top of a sliding block (3). Return cylinders (7) and mold opening cylinders (8) are respectively provided between columns on the same side. The return cylinders and the mold opening cylinders on the left and right sides are diagonally distributed. The intermediate cylinders and the side cylinders are respectively connected to an oil tank by means of a prefill valve (D0). The hydraulic press machine for a fiber-reinforced plastic product has a large worktable area, a long stroke of the sliding block, and a large pressing force, and avoids the stress concentration problem caused by the large worktable surface.
C: The present invention relates to a surgical robot, comprising a base, a column, mechanical arms, and a push handle. The push handle is fixedly mounted on the rear part of the upper end of the base; the column is fixedly mounted in the middle of the upper end of the base; the mechanical arms capable of moving up and down are disposed on side walls of the column; mechanical arm connecting devices are provided between the column and the mechanical arms. According to the present invention, the mechanical arm connecting devices enable the mechanical arms to obtain larger movement ranges and spaces towards the front, the left side, and the right side, and also facilitate positioning of the mechanical arms before surgery, to obtain a larger surgical space; mechanical arms may be mounted on the four sides of the column, one mechanical arm can be independently used, and two or three or four mechanical arms can be simultaneously used; by means of the mechanical arms at different positions and in various combinations, surgical requirements with different mounting requirements are met.
D: Disclosed is a fixable cell culture assembly, comprising a cell culture bag and a biological shaker, wherein the biological shaker comprises a tray, and the cell culture bag comprises a closed bag body and a fixing assembly, which comprises a bottom sheet, a chuck and a screwing cap. The bottom sheet is fixedly connected to the closed bag body; the chuck comprises a threaded post and an elastic clamping jaw; the screwing cap is of an up-down through structure and comprises a threaded pipe section and a tapered pipe section; a groove is provided in an upper end face of the tray; and a clamping rod, which cooperates with the chuck, is vertically arranged at the bottom of the groove. The present application has the beneficial effects of the cell culture bag and the tray being quickly fixed and separated from each other, the cell culture bag not sliding when the tray swings, the cell culture efficiency being higher, the loss being less, and the improvements to the tray being minor, such that the cell culture assembly is suitable for most biological shakers on the market, the replacement cost of the shaker is reduced, and the promotion of same is easy.
Answer: D