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stone bolt
archit. 底脚螺栓; 棘螺栓
bridg.constr. 锚栓
chem. 地脚螺钉
met. 地脚螺栓; 棘头螺栓
tech. 石榫; 石栓; 底脚螺钉
stone bolt: 3 phrases in 1 subject
Technology3