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阀封
 阀封
auto. valve seal
nautic. tech. valve seal
tech. jam pot cover
| 顶部装料
 顶部装料
el. top loading
| 系统
 DPA系统
pest.contr. DPA System
 F系统
rem.sens. F system
 PELV系统
el.mach. PELV system
 SELV系统
el.mach. SELV system
 TN-C 系统
IT TN-C system

to phrases
阀封
auto. valve seal
阀封阀座
nautic., tech. valve seal
阀封
tech. jam pot cover
门密
tech. valve seal
阀封
: 97 phrases in 19 subjects
Architecture1
Automobiles6
Aviation1
Chemistry1
Drilling6
Electronics3
Engineering geology1
Hydroelectric power stations3
Mechanics1
Metallurgy14
Nautical1
Nuclear and fusion power1
Oil / petroleum17
Plastics2
Refrigeration4
Shipbuilding1
Space1
Technology32
Water polo1