耐久性

PE-RT is referred to as the Polyethylene Raised Temperature, it is by the ethylene monomer and 1 - octene copolymer from monomers is specifically designed for the heating system of medium-density ethylene - octene copolymer, which has a narrow molecular weight distribution , octene uniformly distributed in the polymer main chain on the special molecular structure, it retained the original PE performance and processing properties of the health advantages, but also strengthen the durability of a new type of high-temperature resin pipe.

PE-RT是Polyethylene Raised Temperature的简称，它是由乙烯单体和1-辛烯单体共聚而成的，是专门为采暖系统而设计的中密度乙烯－辛烯共聚物，其具有分子量分布狭窄，辛烯均匀分布在聚合物主链上的特殊分子结构，它既保留PE原有的卫生性能及加工性能等优点，又强化了高温耐久性的一种新型管材专用料。

On this foundation, the influence factors of tunnels lining durability and their work orderliness were concluded.

然后在此基础上分析了影响隧道衬砌结构耐久性的主要因素及其影响规律。

This paper mainly deals with these two parts:l.the effect of hydrosoluble HP,fibermesh and FDN on cement mortars bend resistant strength and compressive strength under the same operating conditions and with different HP mixtures;2.the effect of HP,FDN moderator,fly ash on the durability of concrete.that is the performance of resisting osmose,erosion and freeze thawing.

研究了HP水溶性高分子"纤维"、FDN高效减水剂与粉煤灰双掺配制的高性能混凝土的耐久性(抗渗透、抗硫酸盐侵蚀、抗冻融性能)。试验结果表明：HP水溶性高分子"纤维"对水泥砂浆和混凝土具有显著的增韧、增强作用，且水泥砂浆的抗压强度随着HP水溶性高分子"纤维"掺量的增加(2%-6%)而提高，抗折强度则降低；在混凝土中加入HP水溶性高分子"纤维"后，抗压强度随着掺量的增加2。

Kletterlift outsole is specifically designed for comfort and durability.

Kletterlift鞋底是专为舒适性和耐久性设计的。

The Ingento Paper Cutter combines the distinctive beauty of solid maple hardwood with the durability of cast iron.

该切纸机Ingento相结合的独特美丽的枫叶坚实的硬木与耐久性的铸铁。

The ancient Greeks recognized marble's durability, using it to build the Parthenon in Athens.

古希腊人认识到大理石的耐久性，用它来建立巴特教神殿在雅典。

In the past few years, with the development of building technology, the performance demand of construction materials is more, especially to the high strength and long perdurability of concrete.

在过去的十几年中，随着建筑技术的发展，人们对结构材料的要求越来越高，尤其是对混凝土的高强性和耐久性的要求越来越高。

High performance concrete is high quality and high perdurable concrete .

高效混凝土是具有高质量和高耐久性的混凝土。

Based on the perdurable performance of the asphalt pavement are influenced by water, heating, ultraviolet radiation, this paper studies the water stability, heating ageing and ultraviolet radiation ageing of bituminous mixtures.

基于水、热和紫外线对沥青路面耐久性的影响，针对沥青混合料浸水、受热老化和紫外线老化三个方面进行研究。

Therefore,the permeability of concrete plays an important role in durability of concrete.

因此混凝土渗透性能在混凝土耐久性方面起着非常重要的作用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。