组合自固型无受力螺栓衬板
combination self-fastening untressed bolt back-ling
组合自固型
composite self-fixing type
螺栓
bolt
Bolts
BOLTED
stud
Screw
anchor
bolting
Blot
fastening
Studs
fastener
Screws
screwing
anchoring
absolute state immunity
screw bolt
Stud bolt
anchor bolt
effective diameter of bolt or high-strength bolt
Anchor bolts
contact area
screws & nuts
fastening bolt
Blots
tunable screws
bolting system
connection bolt
stod