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。
Submarine temperature, pressure, gas compositions, geothermal gradient and syngenetic water salinity control the depth of hydrate zone basement.
海底温度和压力、地热梯度、气体成分、同生水盐度等控制着水合物稳定带基底的深度和厚度。
Relationships between flow velocity, flow depth, flow discharge, and slope gradient were simulated in a hydraulic flume.
径流流量、流速、水深以及地表坡度是水动力学特性的重要参数，且相互关系密切。
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