Using hydraulic supports in heavy grade longwall face with sublevel caving, anti-topple and antiskid are the key factors.

在大倾角倾斜煤层进行综放开采，支架的防倒、防滑成为决定放顶煤开采成功与否的关键。

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The paper inhibitor was heavy premium grade art paper of 0.0095 inch (0.24mm) thickness.

文件抑制剂是沉重的保费级铜版纸的0.0095英寸(0.24毫米)厚度。

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Grade I medical accident: causing death or heavy disability of a patient;

一级医疗事故：造成患者死亡、重度残疾的；

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But any extra Saudi oil released now will be too late in arriving and too heavy a grade to keep America's drivers happy.

ECONOMIST: Other reasons to worry

Nothing that would make the tablet uncomfortable to use, but enough to remind you there's a heavy-duty, laptop-grade processor inside.

ENGADGET: Microsoft Surface Pro hands-on Hands-on

Much of Venezuelan oil is also heavy oil, which is a lower grade.

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