Natural test weight of grain seed is an important index of grain quality and grade.
粮食籽粒的自然容重是粮食质量和等级的重要指标。
Get the vulnerability grade of water supply network through index value of the water node.
由用水节点的脆弱性指标值，得到给水管网的脆弱性等级。
Get the vulnerability grade of water supply network through index value of the water node.
由用水节点的脆弱性指标值，得到给水管网的脆弱性等级。
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