设想在本节中，包括活动中心，其中有几场活动，共同展开对一名董事，以及螺母和螺栓板。
Ideas in this section include activity centres, which are several activities mounted together on one board, and nut and bolt boards.
活动装置主要有螺母、螺栓、提升楔块、后座、座板支座、弹簧以及压板等组成。
The movable device mainly consists of the nut, bolt, lifting wedge, backseat, supporting seat of the clamp plate, spring and pressure plate and so on.
本实用新型由转动丝杠、梯形螺母、钳身、活动钳体、钳座等主要零部件组成。
The utility model essentially consists of essential parts of a rotating lead screw, trapezoid nuts, a clamp body, a movable clamp body and a clamp block, etc.
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