This product is fully closed structure and can work in every moist (it still can normal working under water 1.5 meter), dust and corrosiveness environment.
整体式全封闭结构，确保在各种潮湿(可在水下1.5米处正常工作)、粉尘及腐蚀性环境中工作。
Secondly, under the certain assumption, the closed form solution of the product is obtained.
其次在一定假设下，对产品进行定价，获得定价闭合解；
This research on closed-loop supply-chain under the final product price fluctuations with robust optimization is divided into three parts.
本文对最终产品价格波动下闭环供应链的鲁棒研究共有三个部分。
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