常用的此类轴承有两种形式：NN30/W33、NN30K/W33两个系列轴承内圈带挡边，外圈可分离；
There are two common forms of such bearings: NN30/W33, NN30K/W33 two series of bearing inner ring with ribs, separable outer ring;
船员舱沿用了熟悉的带弧形挡热板的圆锥形状 这已被证明是探月返回时的最佳形状。
The crew module borrows the familiar conical shape with a curved heatshield, which has proven to be the optimal shape for missions returning from the moon.
介绍了一种常用于SSJ1400/4×400型巷道带式输送机的多用途卸料缓冲装置，此装置既能解决挡煤板前的积煤问题，又增加了挡煤板的推拉功能。
This paper introduces a multi-purpose unloading buffer device that is commonly used with the type SSJ1400/4X400 belt conveyor for use in tailgates.
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