filter drain是什么意思

用法例句

The geogrid has high modulus of elasticity, high tension strength, good coherence with soil and fine durability, so it has been used for reinforcing the retaining wall, steep bank slope, filter pack and geoweb-grass protection engineering.

介绍在堤防工程中被用于加筋土挡墙、加筋陡坡、排水反滤结构及土工网植草防护等的情况。