Secure the heavy duty lock plates in your doors with four three-inch screws.
确认重型锁片以及4个3英寸螺丝置于门中。
Remove the screws, washers and nuts from the lock handles for the air inlet duct.
从进气管道的锁手柄上拆下螺栓、垫圈和螺母。
Install the screws, washers and nuts that attach the lock handles in their positions.
装上螺钉、垫片和螺母,将锁手柄固定在其位置上。
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