Building such a bridge over the bay was a hard nut to crack but the local government made it within two years.
在海湾上建造这样一座桥是一件困难的事情，但当地政府在两年内完成了。
The fastener, the bridge piece, the turning, presses the riveting nut, the hollow nut, non-tender.
紧固件、连接件、车削件、压铆螺母、空心螺母、非标件。
The utility model is of bridge type structure of right and left upright pillars adding top beam, the lifting device with nut screw mandrel is moving along the upright pillars.
本实用新型为左右立柱加顶部横梁的桥式结构，螺母丝杆升降装置沿立柱上下移动。
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