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- Novolac for shell molding was gained under direct microwave irradiation and microwave irradiation associated with water bath using this device. 利用此装置,采用微波直接辐射及水浴协同加热相结合的方式合成出壳法用热塑性酚醛树脂。
- Novolacs for shell molding 壳法用酚醛树脂
- The results showed that a kind of fast curing novolac for shell process whose softing point is reasonable was easily prepared by compound catalysis. 试验表明,采用复合催化法很容易制备聚合速度快且软化点适宜的壳法用热塑性酚醛树脂。
- Synthesis of Low Free Phenol Novolac for Shell Process 低游离酚壳法用热塑性酚醛树脂的合成
- It is a particularly suitable method for shell dams. 这是一种对壳体坝特别适用的方法。
- You are enable to increase the number of shell mold production. 使铸型的生产效率的提高成为了可能。
- As the tide receded we were able to look for shells. 潮水退去,我们就能寻找贝壳了。
- Equations of rate of exergy loss for shell and tube exchanger are derived. 导出了管壳式换热器的火用损率计算公式,对影响功火用损的因素进行了分析。
- Then one solution would be for Shell to build at P,Esso to build as Q,B. 进一步我们假定出于经济考虑没有一个公司希望在相邻的拐角处修建两个汽车修理厂。
- The kids were hunting for shells on the beach. 孩子们正在沙滩上找贝壳。
- Abstract It is not of profit for volume use of resin coated sand in hotbox coremaking that the former has been developed for shell core and mold. 为造壳芯与壳型发展的树脂覆膜砂大量用作热芯盒造芯材料是不经济的。
- A new kind of boron nitride based shell mold used for investment casting titanium alloys was fabricated and the reaction between it and Ti-Ni alloy was investigated. 摘要研究了一种新型钛合金精密铸造用型壳-氮化硼基复合型壳及其与钛镍合金的界面反应和反应层的形成机制。
- The sedan camshafts re-melting and chilling process and production technique of shell mold camshaft castings to he re-melted and chilled were introduced. 摘要介绍重熔淬火硬化处理凸轮轴工艺,以及供重熔淬火用的壳型凸轮轴的生产工艺。
- The face coating of investment shell mold was made up of hexagonal boron nitride (hBN) powders with a few yttria (Y2O3) particles and colloidal yttria as binder. 氮化硼基复合型壳的面层主要由预处理后的六方氮化硼粉体、氧化钇粉体和粘结剂钇熔胶组成。
- Heat budget equations for shell and body are segregated respectively to improve accuracy of this model. 此模式将螺壳与螺体的热收支分闭讨论,以增加模式的准确度。
- The sedan camshafts re-melting and chilling process and production technique of shell mold camshaft castings to be re-melted and chilled were introduced. 介绍重熔淬火硬化处理凸轮轴工艺,以及供重熔淬火用的壳型凸轮轴的生产工艺。
- Army and OSS personnel and testing was also disguised as a remedy for shell shock. 并且,实验也以给受到惊吓的人员治疗的幌子作为伪装。
- The reaction interface between Ti-Ni alloy and BN based shell mold was studied by scan electron microscopy (SEM) and electron probe micro-analyzer (EPMA). 利用扫描电镜、电子探针等检测手段对钛镍合金铸件表面反应层进行了研究;
- In ordinary consumers the impression that "Heineken" appears to be a synonym for Shell lubricants. 在普通消费者的印象中,“喜力”似乎就是壳牌润滑油的代名词。
- As the tide receded(from the shore)we were able to look for shells. 潮水(自岸边)退去;我们就能寻找贝壳了.