The locking bolt is provided with an outer thread mating with the expansion pipe at the peripheral surface and has a groove at one end.
一锁定螺栓，其周面上具有与膨胀管相匹配的外螺纹，并在其一端设有凹槽。
The locking bolt is provided with an outer thread mating with the expansion pipe at the peripheral surface and has a groove at one end.
一锁定螺栓，其周面上具有与膨胀管相匹配的外螺纹，并在其一端设有凹槽。
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