1.
left hand thread
左螺纹，倒牙（逆时针方向旋进）
2.
About Cutting Method in the Application of NC Turning Trapezoidal Thread
左右切削法在梯形螺纹数控车削中的应用
3.
boxpin connection
阴螺纹-阳螺纹连接
4.
male and female cross
阳螺纹-阴螺纹十字接头
5.
external and internal thread grinding machine
外螺纹及内螺纹磨床
6.
pin-to-box pipe
阳螺纹-阳螺纹管子
7.
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
8.
Screwed Joint 1;Screwed Joint 2;Screwed Joint 3
螺纹接头 1;螺纹接头 2;螺纹接头 3
9.
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。
10.
double-screw bolt
螺柱，双头螺纹螺栓
11.
Tapping screws thread
GB/T5280-1985自攻螺钉用螺纹
12.
threaded type track bolt nut chuck
螺纹式轨道螺母夹头
13.
coarse threading attachment
大螺距螺纹切削装置
14.
remove the thread (of screws).
去掉（螺丝钉的）螺纹。
15.
The threads of the screw work hard.
这螺丝的螺纹太涩了。
16.
Apply pipe dope sparingly on pipe threads, never on valve threads.
在管道螺纹上涂敷螺纹油，但是不要在阀门螺纹上涂螺纹油。
17.
NPT tapered tube thread gauges
NPT锥管螺纹量规
18.
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。