Grade d: Hair and, where relevant, beard should be covered. A general protective suit and appropriate shoes or overshoes should be worn.

级：头发和胡须要覆盖，要穿戴一般工作服和合适的工作鞋或鞋套。

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The table relates sheathing thickness, nail size and spacing, sheathing grade and allowable unit shear to enable determination of an appropriate construction configuration.

表中涉及覆板厚度，钉的大小和间距，覆板等级和允许单位剪切，来确定适当的施工构造。

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As such, manufacturers use extensive testing to determine which applications a glove is appropriate for, with medical-grade gloves having higher standards. Here's an overview of the process.

因此，制造商使用广泛的测试，以确定哪一个手套应用是合适的，而医疗级手套就具有更高的标准。以下是过程概述。

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Again, with the caution that exams taken in isolation cannot be easily assessed, he says that a D grade is much too low - and he suggests that a B might be more appropriate.

BBC: A-level marking 'grossly unjust'

While China is in a category separate from the Warsaw Pact, we believe it appropriate for the United States, together with its COCOM partners to freeze (if not down-grade), the level of Western dual-use technology currently available to the Chinese government.

CENTERFORSECURITYPOLICY: "US Relations With China"