产品包括：螺栓、螺钉、螺柱、U型螺栓、预装配的螺钉和垫片组件以及与预装配组件一样加工的无垫圈产品。
Products included are bolts, screws, studs, U-bolts, preassembled screw and washer assemblies (sems), and products manufactured the same as sems except without washer.
装上螺钉、垫片和螺母，将锁手柄固定在其位置上。
Install the screws, washers and nuts that attach the lock handles in their positions.
将再循环风扇的接耳放置在正确位置，安装垫片、螺钉、螺帽。
Put the recirculation fan lugs in position and install the washers, the bolts, the washers and the nuts.
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