effective diameter of bolt or high-strength bolt
friction high-strength bolt
friction-type high-strength bolt
Friction-typed high-strength bolt
Friction-typed high-strength bolt connection
High strength bolt and weld steel railway bridge
High Strength Bolt Connection
high strength bolt steel
high-strength bolt junction
joint of high strength bolt
sets of torshear type high strength bolt
tor-shear type high-strength bolt
high strength and high pretension yieldable bolt
High strength connecting rod bolt
high strength friction grip bolt
high-strength friction grip bolt
High-strength Prestressed Anchor Bolt