Lock is connected to lug on the steel structure by pin, the other end is connected to other structure parts.
拉杆锁头通过销钉与钢结构上耳板连接，另一端连接其他结构件。
The side of the lock-up set is provided with a semicircle lug boss, which is allocated with the semicircle groove arranged on the shell.
锁止套周侧设置半圆凸台，半圆凸台与设置在壳体上的半圆凹槽相配置。
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