A.0.1~0.2mm B.0.2~0.5mm C.0.5~0.6mm D.0.6mm以上
A.70%~80% B.80%~85% C.85%~95% D.90%以上
A.土工膜 B.非機(jī)織土工布 C.土工網(wǎng) D.土工帶