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厚壁钻杆
dril. extra-heavy drill rod; extra-heavy pipe; heavy weight drill pipe/heavy wall drill pipe; heavy wall drill pipe; thick-wall drill pipe; havi-wate drill pipe
earth.sc. thick wall drill pipe
mech. thick wall drillpipe
厚壁钻杆
: 5 phrases in 2 subjects
Metallurgy3
Technology2

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