标准 管 | |
chem. | standard pipe |
标准管 | |
earth.sc. | national pipe |
mech. | National Pipe |
oil | prover |
NPT母扣 | |
mech. | female national pipe thread |
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prover | |||
standard pipe; standard tube | |||
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standard pipe | |||
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national pipe | |||
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American National Pipe |
标准管 : 221 phrases in 40 subjects |