Please select the most similar patent number from A, B, C and D. Which number is?
A hydraulic press implementing efficient sealing, comprising a hydraulic press body (17) and a first telescopic rod (7). The front surface of the hydraulic press body (17) is provided with a control panel (16), and the top end of the hydraulic press body (17) is provided with a support (6); the other side of the hydraulic press body (17) is provided with a control box (14); the bottom end of the hydraulic press body (17) is provided with castors (18), and one side of the hydraulic press body (17) is provided with a sleeve (4); a push rod 5 is embedded into the interior of the sleeve (4); a sealing layer (1) is provided in the hydraulic press body (17). The hydraulic press reduces dangerous situations and improves working and use efficiency.
A: A stamping-resistant integrated hydraulic machine, comprising a base (1), a square supporting column (2), a rotary table (3), a lifting stamping device and die (5), a hydraulic oil cylinder (6), and a control panel (10) which are arranged in sequence from bottom to top. The hydraulic oil cylinder is disposed on the top of the lifting stamping device and die (5) and goes up and down along with the lifting stamping device and die. At least two guiding columns (4) are disposed in the position between the lifting stamping device and die and the base and close to the square supporting column. The square supporting column is disposed at one side of the base (1). The rotary table is driven by a rotary shaft (7) and a motor (8) to rotate above the base (1). An air rubber spring (9) is further connected between the rotary table and the base. A compression spring (14) is further sleeved in the air rubber spring. Both ends of the air rubber spring and both ends of the compression spring are respectively fixed to the bottom of the rotary table and the top of the base. The stamping-resistant integrated hydraulic machine is convenient to operate and has a good vertical lifting degree.
B: An automatic printing paste stirrer, comprising a stirrer body (1), support legs (2), a groove (3), a hydraulic rod (4), a first pulley (5), a shell (6), a hydraulic station (7), a servo motor (8), a two-way gear pump (9), a hydraulic oil tank (10), a bracket (11), a sliding chute (12), a stirring station (13), a second pulley (14), a paste cup (15), a control switch (16), a control panel (17), stirring shafts (18), a suspended hood (19), universal pipes (20), illuminating lamps (21), lifting lugs (22), a connecting port (23), a negative pressure fan (24), an air delivery pipe (25), a processing box (26), an air inlet (27), and an air outlet (28). The hydraulic rod (4) is mounted in the groove (3); one end of the hydraulic rod (4) is mounted with the first pulley (5); the hydraulic station (7) is mounted at the inner side of the support leg (2); one side of the control switch (16) is mounted with the control panel (17); the suspended hood (19) is sleeved at the top of the stirring shaft (18); one end of the top of the shell (6) is mounted with the universal pipe (20); one end of the universal pipe (20) is mounted with the illuminating lamp (21); the lifting lugs (22) are welded at four corners of the top of the shell (6); the negative pressure fan (24) is mounted at one side of the connecting port (23); and one side of the connecting port (23) is connected to the processing box (26) by means of the air delivery pipe (25). The automatic printing paste stirrer has the advantages of convenient movement, high stability during work, easy transportation, and can improve the working environment, facilitate mixing effect observation, and is beneficial to enterprise production.
C: Provided is a print washing fastness tester, comprising a tester body (1), support legs (2), a groove (3), a hydraulic rod (4), a slide wheel (5), a hydraulic station (6), an electric control box (17), a control panel (18), a fixed rotary shaft (21), a protective housing (22), a shock-absorbing base (25), and a top plate (30); the support legs (2) are mounted at the bottom end of said tester body (1); the groove (3) is provided inside the support leg (2); the hydraulic rod (4) is mounted inside the groove (3); the slide wheel (5) is mounted at one end of the hydraulic rod (4); the hydraulic station (6) is mounted on the inner side of the support legs (2); a support post (16) is mounted on one side of the top of the tester body (1); the electric control box (17) is mounted at one end of the support post (16); the control panel (18) is mounted on one side of the electric control box (17); the protective housing (22) is mounted on the two sides of the top end of the electric control box (17) by means of the fixed rotary shaft (21); the shock-absorbing base (25) is mounted at the bottom end inside the housing (10); the print washing fastness tester is convenient to move and is highly stable when operating; the electric control box (17) is also better protected and the internal components can be protected, increasing the service life of the instrument.
D: Disclosed is an efficient rust removal device, comprising a deruster body (1), wherein a base (8) is arranged outside the deruster body (1); a rust removal liquid jet tube (9) is mounted on one side of the base (8); a handle (17) is mounted on the other side of the base (8); a high-pressure oil mist jet tube (2) is mounted below one side of the base (8); a control panel (3) is mounted on the front side surface of the base (8) in an embedded manner; expanding pulleys (7) are mounted below the base (8); and a grinding head (19) is mounted on the side, close to the expanding pulleys (7), of the lower part of the base (8). A rubber dust cover (6) is provided, and the rubber dust cover (6) is used, such that dust generated during grinding can be controlled and prevented from flying away and injuring the respiratory organs of an operator, and accordingly, the quality of the working environment is thus improved.
Answer: A