质量控制从严格检测进入工厂的原材料开始。
Quality Control From the strict testing of materials into the factory began.
当我们进入工厂时，我们的水泵正由一个老工人在修理。
When we came into the factory, our water pump was being repaired by an old worker.
当我们进入工厂时，我们的水泵正由一个老工人在修理。
When we came into the factory, our water pump was being repaired by an old work er.
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