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Oil / petroleum
containing
支 用
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English
专用分支线路
dedicated branch circuit
支持天线用的系留气球
kytoon
支撑作用
slab effect
支撑作用
beam effect
格列克通用支数
Grex number
气用户支线
gas service line
燃气进用户支线
gas service line
用户支线阀
service line valve
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