... 阵地卫生 medical service on the battlefield; position hygiene 阵地战 positional warfare 阵地作业机械 position operating machinery ...
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If the operator is intended to sit during operation and the operating position is an integral part of the machinery, the seat must be provided with the machinery.
如果操作者在预定操作期间为坐姿，并且操作位置是该机械的一个组成部分，则该机械必须提供座椅。
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