boxpin connection
阴螺纹-阳螺纹连接
male and female cross
阳螺纹-阴螺纹十字接头
pepe bend with male and female thread
一头带阳螺纹一头带阴螺纹的弯头
box up and pin down
上部阴螺纹-下部阳螺纹接头
pipe bend with female thread
两头带阴螺纹的弯头
coupling straigth-way cock
两端带阴螺纹管接的直通旋塞
Nuts have internal (or female) threads to match those of the Bolt.
螺母上有内(或阴)螺纹,与螺栓上的螺纹相啮合。
In particular, duck vaginas are often equipped with additional passages that have blind endings, and frequently corkscrew in a clockwise direction, in contradistinction to the anticlockwise thread of a drake's penis.
事实上，母鸭的阴道有很多具有顺时针螺纹的憩室，而对比来看公鸭的阴茎则有逆时针的螺纹。
external and internal thread grinding machine
外螺纹及内螺纹磨床
pin-to-box pipe
阳螺纹-阳螺纹管子
Screwed 1;Screwed 2;Screwed 3;Screwed 4
螺纹接头 1;螺纹接头 2;螺纹接头 3;螺纹接头 4
Screwed Joint 1;Screwed Joint 2;Screwed Joint 3
螺纹接头 1;螺纹接头 2;螺纹接头 3
Tubing thread is available for API tubing threads and TM threads.
油管螺纹可采用API油管螺纹，或TM螺纹。
double-screw bolt
螺柱，双头螺纹螺栓
Tapping screws thread
GB/T5280-1985自攻螺钉用螺纹
threaded type track bolt nut chuck
螺纹式轨道螺母夹头
coarse threading attachment
大螺距螺纹切削装置
remove the thread (of screws).
去掉（螺丝钉的）螺纹。