这主要基于共同核心，还有现行的加利福尼亚州标准。
These are based largely on the common core, but also existing California standards.
回顾了我国现行矿产储量分类分级标准的制订情况，分析了其存在的主要问题。
The formulating circumstance of present mineral resource's classification and gradational standard are reviewed, and existed major problems analyzed.
现行辐射定标方法都需要建立高精度初级标准及标准传递链，传递环节是误差的主要来源。
The current methods of the radiometric calibration are based on the establishment of high-precision primary standard and standard transfer chain, and the transfer chain is the main source of errors.
ZL 108合金是目前国内发动机活塞材料使用的一种主要铸造铝合金牌号，我国现行标准中zl108并不含钛。
Alloy ZL108 is a main brand of cast aluminum alloy used for power engine piston material, it is not needed to contain titanium according to the national standard now.
ZL 108合金是目前国内发动机活塞材料使用的一种主要铸造铝合金牌号，我国现行标准中zl108并不含钛。
Alloy ZL108 is a main brand of cast aluminum alloy used for power engine piston material, it is not needed to contain titanium according to the national standard now.
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