常見例句Structures of disktype stitch gauge adjustor,levertype adjustor and spring-actuated threading device make convenient use for customers. 具有操作簡便的線跡調整機構，按紐試針距離節(jié)杠桿式差動調節(jié)和彈出式過線機構，易操作，線跡美。 返回 levertype