A pipe coupling threaded on both ends.
螺纹接头一种两端都带外螺纹的管子
pepe bend with male and female thread
一头带阳螺纹一头带阴螺纹的弯头
Secondly there is error between thethread roll angles of thread rolling die and drill rod.
滚丝轮螺纹和钻杆螺纹的螺旋角有误差。
threaded bottom guide
有螺纹的底部导向鞋
pin-to-pin reducer
两头阳螺纹的大小头
pipe bend with female thread
两头带阴螺纹的弯头
double pin sucker rod
两头阳螺纹的抽油杆
remove the thread (of screws).
去掉（螺丝钉的）螺纹。
The threads of the screw work hard.
这螺丝的螺纹太涩了。
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。
Pipe threads where pressure-tight joints are made on the threads
GB/T7306-1987用螺纹密封的管螺纹
minimum number of pipe threads for connections
管螺纹连接的最少螺纹牙数
Pipe threads where pressure-tight joints are not made on the threads
GB/T7307-1987非螺纹密封的管螺纹
Gauges for sealing tube threads
用螺纹密封的管螺纹量规
Gauges for nonsealing tube threads
非螺纹密封的管螺纹量规
The Manufacturing Process for Core Thread of Bottle Cap Injection Mould
瓶盖注射模螺纹型芯的螺纹制造工艺
On Screw Thread Structures and Screw Thread Fasteners;
螺纹和螺纹连接图绘制中的几个问题
all screw threads are according to aNSI B-1.1 coarse thread.
所有螺栓的螺纹都符合aNSI B-1.1粗牙螺纹标准。