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方头螺钉
archit. square head screw
bridg.constr. lag screw
ecol. screw bolt
tech. coach screw; square-head screw; square-headed screw
方头六角头螺钉
gen. coachscrew
方头螺钉
dril. coach screw
方头螺钉
: 17 phrases in 7 subjects
Architecture1
Automobiles1
Aviation1
Construction1
Metallurgy1
Shipbuilding3
Technology9