It could take about two years for the whole excavation. After each extraction of material, we must leave the tower for a month to see if the cavity we have created closes up and the tower settles back.

“整个挖掘大约要进行两年,每次挖土后我们将留出一个月的时间来看挖掘的空洞是否封闭,塔身是否沉回。”

属类：综合句库--

Method for chemical analysis of tantalum-niobium ores-Determination of tantalum content-preconcentration and separation with silica gel-butyl rhodamine B extraction photometric method

GB/T17415.1-1998钽、铌矿石化学分析方法硅胶富集分离--丁基罗丹明B萃取光度法测定钽量

属类：行业标准名称--

Test method standard for leaching toxicity of solid wastes--Horizontal vibration extraction procedure

GB5086.2-1997固体废物浸出毒性浸出方法水平振荡法

属类：行业标准名称--

determination of benzene and some derivatives-part2 : method using extraction and gas chromatography

苯和某些衔生物的测定-第2部分:使用提炼法和气相色谱法

属类：行业标准名称-试验方法-

Methods for chemical analysis bismuth--Determination of zinc content--Solid-liquid extraction -flame atomic absorption spectrophotometric method

铋化学分析方法固液萃取分离火焰原子吸收光谱法测定锌量

属类：行业标准名称-国家标准名-GB/T8220.5-1998

Extraction of humic substances from sediments is often the first task that confronts the investigator

从沉积物中萃取腐殖物是研究工作者遇到的第一个问题。

属类：综合句库--

Animal and vegetable fats and oils--Determination of unsaponifiable matter Part 2: Rapid method using hexane extraction

动植物油脂不皂化物测定第二部分:己烷提取快速法

属类：行业标准名称-国家标准名-GB/T5535.2-1998

Animal and vegetable fats and oils--Determination of unsaponifiable matter Part 1: Method using diethyl ether extraction (Reference method)

动植物油脂不皂化物测定第一部分:乙醚提取法(第一方法)

属类：行业标准名称-国家标准名-GB/T5535.1-1998

determination of hydrolized formaldehyde of textile products:water extraction method

纺织品中甲醛含量的测定:蒸气吸收法

属类：行业标准名称-试验方法-

determination of selected plant treatment agents-method using high performance liquid chromatography with uv detection after solid-liquid extraction

固体-液体提取后用uv检验液相色谱高功能植物处理剂使用方法的测定

属类：行业标准名称-试验方法-

Lubricated metallic powders--Determination of lubricant content--Soxhlet extraction method

含润滑剂金属粉末中润滑剂含量的测定索格利特(Soxhlet)萃取法

属类：行业标准名称-国家标准名-GB/T8643-1988