V-type thread V形螺纹

lock type thread 锁紧型螺纹

plate type thread rolling machine 板式滚丝机

old-type thread-stitched book 线装书

plate-type thread rolling machine 板式滚丝机

vee-type thread 形螺纹

roller-type thread 滚柱式螺纹

roller type thread 滚柱式螺纹

Thread Type 螺纹类型 ; 外螺纹规格