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装式密封
chem. external seal
外密封 wàimìfēng
tech. outer gland sealing
外 密封
: 52 phrases in 13 subjects
Architecture1
Astronautics1
Automobiles12
Aviation1
Electric machinery2
Electronics10
General2
Lighting other than cinema1
Nautical1
Oil / petroleum1
Plastics2
Rail transport1
Technology17