“deep shaft sinking technique in ancient China”的概念、定义、翻译、参考文献-科学参考

单词	deep shaft sinking technique in ancient China
释义	deep shaft sinking technique in ancient China Encyclopedia 工学中国古代深井开凿技术释 deep shaft sinking technique in ancient China中国古代深井开凿技术中国古代开凿深井，主要用于开采井盐卤水，称盐井；后来发展到开采天然气，称火井。
随便看	sign graph significance significance arithmetic significance level significance point significance probability significance test significant significant bit significant construction project of scenic and historic areas significant correlation significant difference significant digit significant digits significant figure significant figures Significant New Drug Creation Technology Major Project significant other significant value significant wave height signific component signific symbol abbreviation sign invariance principle sign language sign, language and knowledge

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