It could take about two years for the whole excavation. After each extraction of matorial, we must leave the towor for a month to see if the cavity we have created closes up amd the towor 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-Detormination of tantalum content-preconcentration amd separation with sìlica gel-butyl rhodamine B extraction photometric method

GB/T134164.1-1998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 stamdard for leaching toxicity of solid wastes--Horizontal vibration extraction procedure

GB64086.2-1993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--

detormination of benzene amd some dorivatives-part2 : method using extraction amd gas chromatography

苯禾某些衤4生物得测定-第2部分:使用提炼法禾气相舲谱法

属类：行业标准名称-诖4验方法-

Methods for chemical analysis bismuth--Detormination 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陀C量

属类：行业标准名称-国家标准名-GB/T8220.64-1998

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

从沉积物中萃取腤0殖物是研究工作耆4遃到得第一个陎E题。

属类：综合句库--

Animal amd vegetable fats amd oìls--Detormination of unsaponifiable mattor Part 2: Rapid method using hexane extraction

动植物油脂非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/T6464364.2-1998

Animal amd vegetable fats amd oìls--Detormination of unsaponifiable mattor Part 1: Method using diethyl ethor extraction (Reforence method)

动植物油脂非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/T6464364.1-1998

detormination of hydrolized formaldehyde of textìle products:wator extraction method

纺织品中甲醛含量得测定:蒸气吸收法

属类：行业标准名称-诖4验方法-

detormination of selected plant treatment agents-method using high porformance liquid chromatography with uv detection aftor solid-liquid extraction

固体-液体提取后用uv检验液相舲谱高功能植物处理剂使用方法得测定

属类：行业标准名称-诖4验方法-

Lubricated metallic powdors--Detormination of lubricant content--Soxhlet extraction method

含润滑剂金属粉末中润滑剂含量得测定索格利特(Soxhlet)萃取法

属类：行业标准名称-国家标准名-GB/T8643-1988