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- Polyether polyols with high mlecular weigh, marrow molecular distribution and low monolwere prepared by using a double metal cyanide catalyst. 使用雙金屬氰化物絡(luò )合催化劑，制備了分子量高、分子量分布窄、不飽和度低的低單官能度聚醚多元醇。
- In this paper several methods including acylamide dehydration,metal cyanide replacement,etherification and isoxazole method for synthesis of 3,3-diethoxyethylcyanide were reviewed. 綜述了3,3-二乙氧基丙腈的合成方法,包括酰胺脫水、金屬氰化物取代、醚化和異惡唑法,用于工業(yè)化生產(chǎn)較為滿(mǎn)意的合成路線(xiàn)是以1,1,3,3-四乙氧基丙烷為原料的異惡唑法。
- The polyether polyols which has higher molecular weight,narrower molecular weight distribution and lower unsaturation can be prepared by using double metal cyanide (DMC) complex catalysts. 用雙金屬氰化物(DMC)絡(luò )合催化劑可制得相對分子質(zhì)量高、相對分子質(zhì)量分布窄和不飽和度低的聚醚多元醇。
- She knows why the metal is the good conductor. 她知道金屬為什么是好的導體。
- Can I fasten these metal plates with rivets? 我可以用鉚釘把這些金屬板固定在一起嗎？
- You need a strong adhesive to bond wood to metal. 需要強力膠才能把木料粘在金屬上。
- The car was now just a pile of twisted metal. 那輛汽車(chē)已經(jīng)成了一堆壓縮的廢鐵了。
- The metal basin clattered down the stone stairs. 金屬盆子沿著(zhù)石階滾了下去，發(fā)出咣啷聲。
- Aluminum is a kind of light silvery metal. 鋁是一種輕薄并呈銀色的金屬。
- The aeroplane wing showed signs of metal fatigue. 機翼顯出有金屬疲勞的現象。
- The metal frame tends to twist under pressure. 這種金屬框受壓後容易變形。
- The ship was broken up for scrap metal. 這艘船拆毀了當廢鐵用。
- Being heated, the metal is rapidly melting. 由于受熱，金屬在迅速熔化。
- double metal cyanide complex catalyst 雙金屬氰化絡(luò )合物催化劑
- The metal has corroded (away) because of rust. 該金屬已銹蝕。
- double metal cyanide complex catalysts 雙金屬氰化物催化劑
- You need a powerful saw to cut through metal. 切割金屬需用強勁的鋸。
- In order to strength the adsorption performance of fiber to metals cyanide ions in bearing cyanide wastewater, ultrasonic wave is used in adsorption process of ion exchange fiber through static experiment methods. 摘要為了強化纖維對于含氰廢水中氰陰離子的吸附性能，采用靜態(tài)實(shí)驗研究方法，把功率超聲用于離子交換纖維的吸附過(guò)程。
- The hot metal contracts as it cools (down). 熱的金屬一冷(下來(lái))就收縮。
- One of several metal strips forming a leaf spring. 簧片構成片簧的幾個(gè)金屬片中的一個(gè)
