楼下的楼主也不明说。
•
同感。看那个卸下来的螺栓就知道,末端深色部分就是锁紧处。再看本楼的照片,那些螺帽好像不是普通螺帽。
-Shubin-
♂
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04/22/2025 postreply
19:14:46
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