1.
reducing extension piece
异径内外螺纹管接头
2.
" Motor vehicles-Hydraulic braking systems-Pipes tapped holes, male fittings and hose end fittings"
GB/T11611-1989汽车液压制动系金属管、内外螺纹管接头和软管端部接头
3.
A pipe coupling threaded on both ends.
螺纹接头一种两端都带外螺纹的管子
4.
external and internal thread grinding machine
外螺纹及内螺纹磨床
5.
pin-to-box pipe
阳螺纹-阳螺纹管子
6.
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。
7.
Motor vehicles--Pneumatic braking systems--Tapped holes and male fittings
GB/T14171-1993汽车气制动系管路螺纹孔和管接头外螺纹
8.
Situation of technological develop ment of welding internal -thread cop per tubes and seamless internal -thread coppertubes at home and abroad
国内外焊接内螺纹铜管与无缝内螺纹铜管的技术发展状况
9.
carbide tool shank for petroleum pipe external threading
石油管外螺纹硬质合金刀杆
10.
NPT tapered tube thread gauges
NPT锥管螺纹量规
11.
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。
12.
Pipe threads where pressure-tight joints are made on the threads
GB/T7306-1987用螺纹密封的管螺纹
13.
minimum number of pipe threads for connections
管螺纹连接的最少螺纹牙数
14.
Pipe threads where pressure-tight joints are not made on the threads
GB/T7307-1987非螺纹密封的管螺纹
15.
Gauges for sealing tube threads
用螺纹密封的管螺纹量规
16.
Gauges for nonsealing tube threads
非螺纹密封的管螺纹量规
17.
small bundles of spiral vessels
螺纹导管的小维管束
18.
internal ribbed tube
内肋片管，内螺纹管