| 摘要 |
<p>The pipe consists of an inner layer (1) about 0.1 - 1 mm thick of a polyolefin that is inert in relation to water, an adhesi layer (2) about 0.1 - 0.3 mm thick, and an outer supple layer (3) about 0.5 to 4 mm thick containing a tubular reinforcing eleme</p> |
