**s防水卷材的正确表示方法:**s py pe pe 3 10 gb18242-2008;简化时写成:**s ⅰ py pe pe 3 。表含意**s防水)()(py-聚酯毡胎体)(面为pe聚乙烯膜面))(下表面为pe聚乙烯膜面)(厚度为4mm)(每卷材10m2)(技术指标执行gb18242-2008标准)你所问的pyk i pe 3 10py:表示为聚酯毡胎体;k:可能有误;也有...
1 as we all know,the olmpics will hold in beijing th** year.today i will tell you some knowledge on engl**h.2 there are a variety of sports in the olmpics,let's take up these terms about these spo...
investors investing in stocks of the most fundamental purpose ** to make a profit was income. equity investments are the pros and cons of the value of investors grasp the trend of stock prices, stock ...