In the process of producing soft urethane polyester foamed plasics,CFCs as forming agent are replaced by cyclopentane whose value of ozone depletion is zero to decrease the destruction of environment,and the modified poly-ether-alcohol is used as reactants through one-step reaction.

為了解決軟質(zhì)聚氨酯泡沫塑料生產(chǎn)過程中的環(huán)保問題，采用臭氧消耗值為零的環(huán)戊烷為物理發(fā)泡劑替代嚴(yán)重破壞臭氧層的氯氟烴欧美18禁网站，以改性聚醚多元醇與甲苯二異氰酸酯等為主要反應(yīng)物，一步法反應(yīng)研制試產(chǎn)了軟質(zhì)聚氨酯泡沫塑料。

Gone was LeBlanc's trademark dark foppish fringe, replaced by a greying head of salt-and-pepper hair.

當(dāng)年那一縷紈绔子弟標(biāo)志的黑色劉海国产成人在线无码视频，如今也已被滿頭花白頭發(fā)替代。

Gonewas LeBlanc's trademark dark foppish fringe, replaced by a greying headof salt-and-pepper hair.

當(dāng)年那一縷紈绔子弟標(biāo)志的黑色劉海国内自拍视频在线播放A，如今也已被滿頭花白頭發(fā)替代大片女人a黄片。

In this paper, the advantages of diagnosis and analysis system, and system design, the case has been replaced by a database query module and call the document analysis algorithm, design and implementation of a detailed presentation.

本文闡述了診斷分析系統(tǒng)的優(yōu)勢(shì)，并對(duì)系統(tǒng)的總體設(shè)計(jì)精品熟女综合网、已實(shí)現(xiàn)的病例查詢模塊及取代數(shù)據(jù)庫的調(diào)用文檔算法的分析清纯激情欧美、設(shè)計(jì)及實(shí)現(xiàn)過程做了詳細(xì)的介紹。

The car remained in production for more than a decade afterwards; it was intended to be replaced by the Renault Dauphine, launched in 1956, but the 4CV in fact remained in production until 1961, only a year earlier than the more expensive Dauphine was discontinued.

這款車留在生產(chǎn)了十多年以后久久久久精品三级三级，它的目的是由雷諾在1956年推出九大取代在线高清无码黄片，但事實(shí)上4CV生產(chǎn)性爱小视频欧美，直到1961年，僅一年多較昂貴的九大前已經(jīng)停產(chǎn)了999国产精品欧美久久久久久。

Dawsonite in the shapes of foliated columnar, cluster, radial, chrysanthemum or random hair mainly filled in the intergranular pores as cements and a few replaced grains such as feldspar and quartz.

其中十八黄色网站，片鈉鋁石呈板柱狀、束狀一级A片免费在线、放射狀日本黄页网站免费观看、菊花狀、雜亂毛發(fā)狀集合體欧美婬片一级视频播放，主要作為膠結(jié)物產(chǎn)于碎屑巖碎屑顆粒間的孔隙中欧美老妇乱又伦A片，少量交代長(zhǎng)石、石英等碎屑免费看性顶级A片。

Hard drives example, the basic system-driven, the same can be DDK compiler. Reduction of the famous deepfreeze software system is replaced by paper-driven system to achieve.

硬盤驅(qū)動(dòng)的例子黄色网站一二三四五六，系統(tǒng)最基本的驅(qū)動(dòng)，一樣要DDK才可以編譯精品偷拍日韩第一页视频，著名的還原軟件deepfreeze就是通過替換系統(tǒng)文件系統(tǒng)驅(qū)動(dòng)來實(shí)現(xiàn)的久久器只。

There are philosophers who argue that because a definition is simply a way of stating that the words in the definiens can be replaced by the words in the definiendum, nothing new is learned.

這段介紹definition的組成，老外做事很嚴(yán)謹(jǐn)激情狠狠文学网，這個(gè)概念都要定義一下美女黄网址，我們的文章是給嚴(yán)謹(jǐn)?shù)拿绹?guó)人看啊，由此定義的重要性可見一斑激情说！

If the lever is deformed, this must also be replaced.

如果有明顯的變形久久99视频只有这里精品，必須更換。

He deftly folded the typed sheets and replaced them in the envelope.

他靈巧地將打有字的紙折好重新放回信封日本免费高清视频www。