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hex-head
 hex head
auto. 六角头
| screw
 screw
econ. 工钱; 薪水
hydroel.st. 螺丝; 螺旋; 螺旋桨
met. 螺旋装置

to phrases
hex head
auto. 螺栓六角头
met. 六角头
hex-head screw
: 7 phrases in 6 subjects
Automobiles2
Aviation1
Compressors1
Drilling1
Mechanic engineering1
Technology1