查询词典 polypropylene

According to a great deal of tests, each mechanics property and anti-cracking performance of polypropylene fiber cement stabilized macadam were investigated systemically. The main content includes:(1) The formulae of shrinkage stresses of semi-rigid base course were deduced. This thesis analyzed each influencing factor of the maximum value of shrinkage stress and the cracking rule of semi-rigid base course. At the same time, the corresponding prevention measures of the cracks were presented.

通过大量试验，对聚丙烯纤维水泥稳定碎石的各种力学性能和抗裂性能进行了系统的研究，主要内容包括：(1)推导了半刚性基层收缩应力的计算公式，对影响最大收缩应力的各种因素及半刚性基层收缩裂缝产生的规律进行了分析，提出了相应的路面裂缝防治措施。

A newly developed approach, in which sheet metal forming and plastics injection molding are integrated, was used to manufacture complex components combined with aluminum sheet and polypropylene with the mold of non-flat bottom via plastics injection molding machine.

摘 要：在注塑机上利用非平底凹模制备了形状较复杂的铝板/聚丙烯复合结构件，实现了将金属板料成形、塑料注射成形融为一体的复合成形的新工艺。

This product connected to 220 volts AC power to operate after use, suitable for high-low pressure polyethylene, polypropylene films of the seal and cutting.

本产品接通220伏交流电源后即可操作使用，适合于高低压聚乙烯、聚丙烯薄膜的封口及切割。

Apparatus Screw-capped polypropylene tubes (50 ml and 6 ml) were supplied by Sarstedt.

二。2 。仪器分装于旋盖聚丙烯管（ 50毫升和6毫升）由sarstedt 。

And metal materials contrary, the vast majority of non-metallic materials of hydrochloric acid have good corrosion resistance, the rubber-lined plastic pumps and pump such as polypropylene, PTFE, etc.

和金属材料相反，绝大多数非金属材料对盐酸都有良好的耐腐蚀性，所以内衬橡胶泵和塑料泵是输送盐酸的最好选择。

And metal materials contrary, the vast majority of non-metallic materials of hydrochloric acid have good corrosion resistance, so rubber-lined pumps and plastic pumps such as polypropylene, PTFE, etc.

和金属材料相反，绝大多数非金属材料对盐酸都有良好的耐腐蚀性，所以内衬橡胶泵和塑料泵是输送盐酸的最好选择。

And metal materials contrary the vast majority of non-metallic materials of hydrochloric acid have good corrosion resistance the rubber-lined plastic pumps and pump (such as polypropylene PTFE etc.) is the best choice of transportation hydrochloride.

和金属材料相反，绝大多数非金属材料对盐酸都有良好的耐腐蚀性，所以内衬橡胶泵和塑料泵是输送盐酸的最好选择。

This paper describes the basic knowledge of polypropylene, development, modification and cross-linking of related research.

本文叙述了聚丙烯的基本知识，发展方向，改性以及交联的相关研究。

As one kind of general plastic, polypropylene is widely used in each domain of industrial production.

聚丙烯作为一种通用塑料，广泛应用于工业生产的各个领域。

And in the development of the polypropylene catalyst, the electron donor has played a very important role.

在聚丙烯催化剂发展过程中，给电子体起了举足轻重的作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。