immersion proof

例句：

1. 1. The company needs to provide an immersion proof for its new product launch.
   该公司需要为其新产品发布提供浸没证明。
2. 2. The immersion proof is required to be submitted within the specified time limit.
   浸没证明需要在规定的时间内提交。
3. 3. The immersion proof will be checked by the quality control department before the product is shipped.
   浸没证明将在产品发货前由质量控制部门进行检查。