pin-to-box pipe
阳螺纹-阳螺纹管子
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
pin-to-pin reducer
两头阳螺纹的大小头
double pin sucker rod
两头阳螺纹的抽油杆
A pipe coupling threaded on both ends.
螺纹接头一种两端都带外螺纹的管子
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。
NPT tapered tube thread gauges
NPT锥管螺纹量规
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。
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
external and internal thread grinding machine
外螺纹及内螺纹磨床
small bundles of spiral vessels
螺纹导管的小维管束