英语语法分析

Microhardness on the surface layer were measured by microhardness testing machine.

利用显微硬度试验机来测量表面显微硬度。

The feasibility of this method is confirmed by comparison with microhardness method.

在与硬度法的对比试验中，进一步验证了电阻法的可行性。

The hardness gradient, depth, microstructure and phases of nitrided layers were measured with Microhardness Apparatus, Microcopy and X-ray diffractometer.

利用显微硬度计、金相显微镜和X射线衍射仪测定了渗氮层的硬度梯度、层深、显微组织和相组成。