1. 对接铰链:business premises 商业楼宇;商业单位;商用处所 | butt hinge 对接铰链 | butt joint 对头接;对接缝
2. 平接铰链:butt hammer 平头锤 | butt hinge 平接铰链 | butt leather 底革
3. 蝶形活页(连接):screw point 木螺丝尖 | butt hinge 蝶形活页(连接) | special screw 特殊螺丝
noun
1. a hinge mortised flush into the edge of the door and jamb