国产无套内精一级毛片久久久_在厨房拨开内裤进入毛片_91直播在线观看免费_成人日动漫卡一区二区三区动漫_13小箩利无码视频网站免费_久草首页在线观看_欧美成人午夜理论片在线观看_亚洲色多在线观看_91丨九色丨熟女_亚洲人成网站18禁止久久影院

江蘇Leather sewing needle

所屬分類：江蘇Leather sewing
點擊次數(shù)：
發(fā)布日期：2019/06/24
在線詢價

詳細介紹

According to the weight of leather and sewing thread track is usually around 3-4 pin per centimeter. At the same time,people should check the pressure of the foot.the pressure should be smaller than the standard. the sewing speed should be slow and the leather should not be tighten, Also,in order to prevent tearing the leather. people should not return the needle to sewing the leather, knot must be the last step in the sewing production .