Metallographic change is also researched. The hardened surface band depths as well as hardened surface band widths were obtained.

获得了金相组织的变化，获取了试验后的硬化层深度和宽度。

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Onchon amd Kang Da Ri bases both have massive and hardened below-surface facilities.

温川基地和抗大日基地都有大规模坚固的地下设施。

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As the size of parts to be hardened increases, the surface hardness decreases somewhat even though all other conditions have remained the same.

即使所有其它条件保持不变，随着要淬火的零件尺寸的增加其表面硬度也会有所下降。

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Hydraulic fracturing pumps many thousands of gallons of mainly water and sand, with a few chemicals, at high pressure into tight gas-bearing shale deposits (hardened muds), creating cracks that allow gas to flow back up the well to the surface ( Shale Shock).

FORBES: The Fracking Solution Is A Good Cement Job