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管直径
avia. pipe diameter
tech. tube diameter
管直径
: 107 phrases in 21 subjects
Agriculture1
Architecture1
Automobiles1
Aviation3
Construction1
Drilling10
Earth sciences2
Engineering geology2
Explosives and Explosive Ordnance Disposal2
General3
Hydroelectric power stations2
Mechanics2
Metallurgy15
Nautical1
Navigation1
Oil / petroleum10
Plastics2
Rail transport1
Shipbuilding3
Steel production1
Technology43