...安全分级 [gap=1499]nneling engineering; subsea tunnel; construction safety; risk index; evaluation; safety gradation ...
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safety gradation
安全等级
以上为机器翻译结果,长、整句建议使用 人工翻译 。
The safety of vegetable pollution by heavy metals was evaluated referring to national food hygienic and vegetable quality gradation standards.
参照国家食品卫生标准和蔬菜质量分级标准,对蔬菜的重金属污染程度进行了安全性评价。
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