最贵香烟价格,和天下香烟价格表图,飞机上可以带几条香烟,细支香烟

Situation and Development pvc and pe pipe description:

pvc pipes for development has entered a mature stage, due to product quality and construction quality are guaranteed,

Thus ensuring a pvc pipe is to use the effect of the early 1980s, the country to promote the application upvc pipe,

And developed a series of policies, institutional standards have been developed to have a complete product standard test method standards and testing methods,

Construction engineering and technical specifications, so as to unify the standard size and quality indicators, to achieve a product interchangeability.

With the development and application of pe pipe water supply industry in Europe, pe pipes began to receive attention,

Pe water supply pipe with international standards was officially released until 1996, prepared the national standard of reference in 1999 ISo4427 and promulgated in 2000,

Beijing since the second half of 2003, the water supply, the duration pipe have to use environmentally friendly polyethylene PE pipes.