A feeding module (1a, 1b, 1c), comprising: a slider, comprising: two sliding portions, each of them having a first through hole (110s1); a first connecting portion, connected to the two sliding portions; and four sliding blocks with hydrostatic bearing, two of the sliding blocks disposed in the first through hole (110s1) in one of the two sliding portions, another two of the sliding blocks disposed in the first through hole (110s1) in another one of the two sliding portions, and each of the four sliding blocks having a second through hole (130s1); and a guider, comprising two cylindrical portions corresponding to the two sliding portions, one of the cylindrical portions penetrating through the second through holes (130s1) in two of the sliding blocks, and another one of the cylindrical portions penetrating through the second through holes (130s1) in another two of the sliding blocks wherein each of the two sliding portions further has a first inner surface, two oil inlets (110s2) and at least one oil outlet (110s3), the first inner surface surrounds and defines the first through hole (110s1), the two oil inlets (110s2) and at least one oil outlet (110s3) are communicated to the first through hole (110s1), and the two oil inlets (110s2) are communicated to the at least one oil outlet (110s3); characterized in that, in each of the sliding portions, the two sliding blocks and the first inner surface together define a liquid-storage space located therebetween, and the at least one oil outlet (110s3) is communicated to the liquid-storage space. a slider, comprising: two sliding portions, each of them having a first through hole (110s1); a first connecting portion, connected to the two sliding portions; and four sliding blocks with hydrostatic bearing, two of the sliding blocks disposed in the first through hole (110s1) in one of the two sliding portions, another two of the sliding blocks disposed in the first through hole (110s1) in another one of the two sliding portions, and each of the four sliding blocks having a second through hole (130s1); and two sliding portions, each of them having a first through hole (110s1); a first connecting portion, connected to the two sliding portions; and four sliding blocks with hydrostatic bearing, two of the sliding blocks disposed in the first through hole (110s1) in one of the two sliding portions, another two of the sliding blocks disposed in the first through hole (110s1) in another one of the two sliding portions, and each of the four sliding blocks having a second through hole (130s1); and a guider, comprising two cylindrical portions corresponding to the two sliding portions, one of the cylindrical portions penetrating through the second through holes (130s1) in two of the sliding blocks, and another one of the cylindrical portions penetrating through the second through holes (130s1) in another two of the sliding blocks wherein each of the two sliding portions further has a first inner surface, two oil inlets (110s2) and at least one oil outlet (110s3), the first inner surface surrounds and defines the first through hole (110s1), the two oil inlets (110s2) and at least one oil outlet (110s3) are communicated to the first through hole (110s1), and the two oil inlets (110s2) are communicated to the at least one oil outlet (110s3); characterized in that, in each of the sliding portions, the two sliding blocks and the first inner surface together define a liquid-storage space located therebetween, and the at least one oil outlet (110s3) is communicated to the liquid-storage space.