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内螺纹 nèi luówén
auto.	class B thread (internal thread)
chem.	interior screw; internal screw
compr.	female screw; inside thread
dril.	female thread
el.mach.	internal screw thread; negative thread
hydroel.st.	female screw thread
mech.	internal thread
mech.eng.	female screw thread
met.	inside screw
oil	box thread
plast.	box tread; inner screw
refrig.	internal threads
tech.	female screw (螺栓); internal screw thread
内螺纹〈美〉 nèi luówén
plast.	internal thread; female thread
内螺纹internal thread nèi luówén
auto.	B thread
内螺纹阀 nèi luówén
mech.	inside screw valve

内 螺纹: 138 phrases in 21 subjects

Architecture	2
Automobiles	6
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Chemistry	6
Compressors	3
Computer numerical control	2
Construction	1
Drilling	7
Earth sciences	2
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General	2
Management	1
Mechanic engineering	1
Mechanics	2
Metallurgy	8
Nautical	1
Oil / petroleum	15
Plastics	4
Shipbuilding	1
Technology	64
Water resources	2