短語詞組短語steel for fastening piece 緊固件用鋼standard fastening piece 標準緊固件screw fastening piece 螺紋緊固件rating fastening piece 非標準緊固件shear fastening piece 剪力連接件high strength fastening piece 高強度緊固件off -rating fastening piece 非標準緊固件 返回 fastening piece