亚洲精品国产综合专区国自产_99在线无码精品秘 曰本毛片_国产美女福利在线播放_av加勒比无码一区播放_大学生一级毛片免费_妖精视频免费观看正片_日韩中文字暮精品_中文字幕日韩亚洲制服丝袜_强行征服邻居人妻HD高清完整_黑人太大太长了进不去

Vent line connecting part

Used in automobiles crankcase ventilation pipe tubes connect the air pipe connection Not only can rely on the inner hole wall of a butt joint and the sealing ring of the trachea joint interference fit to realize the two kinds of joint connections, and by docking a card table face to match the tracheal joint cuneate raised face, realize the double insurance.