loose pin butt hinge

例句：

1. 1.The new door has a loose pin butt hinge that makes it easy to open and close.
   新门有一个松紧针扣铰链，使得开关变得容易。
2. 2.The old cabinet had a loose pin butt hinge that was causing problems with the doors.
   旧橱柜有一个松紧针扣铰链，导致门的问题。
3. 3.The new car has a tighter pin butt hinge than its predecessor, which made driving smoother.
   新车的针扣铰链比前一代更紧密，使得驾驶更加顺畅。