substrate zone

The results show that the TiC laser clad layer is divided into two regions: clad zone and dilution zone. Clad zone which is not diluted by substrate is made up of TiC particles and TiC dendrites;

结果表明：TiC激光熔覆层分为熔覆区和稀释区两个区域，熔覆区未受到基底的稀释，由TiC颗粒和TiC树枝晶组成；

Weld, heat-affected zone and substrate metal test etc.

焊缝中心区, 热影响区,基体组织检验等.

The main characterization of a self-supporting zone plate is to use not membrane but metal struts to support the zones. This kind of zone plate has a longer life than the zone plates with membrane substrate under radiation.

自支撑型波带片的主要特点是利用金属加强筋来支撑波带片图形，而不是用薄膜来支撑波带片图形，可以提高元件在X射线辐射下的使用寿命。

In the bond zone, the grains develop into the coatings in the form of epitaxial growth and the coatings have a good metallic bonding with the substrate.

熔合区晶粒以外延生长方式向熔覆层内部生长，基体与熔覆层呈现良好的冶金结合。

Based on the investigation record from Guangxi and Hainan Provinces, this species bores in the substrate of sand or sand-mud from surface to 21 cm underneath below the low tide zone to a water depth of 78 m.

据在广西和海南沿海的调查，它生活在潮下带至水深78m的沙或沙泥底质中。营埋栖生活，深度达21cm。