looper造句

1、Entry strip support table, looper roll and four-point centering device.
进料支撑台，跳动辊，四点对中装置。

2、Bend needle mechanism and looper mechanism are two important mechanisms in blind stitching machine.
弯针机构与成圈叉机构是暗缝缝纫机的两个重要机构。

3、Describing working principle and method of new hydraulic looper control system supplied by Germany.
论述了从德国引进的新型的液压活套系统的工作原理和控制的实现方法。