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DIN 2986 - 1977 |
Threaded Steel Pipe Fittings - Sockets
本問(wèn)答對(duì)應(yīng)標(biāo)準(zhǔn):
DIN 2986 - 1977
,標(biāo)準(zhǔn)名稱(chēng)為“螺紋套管”。
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