A.1.1 B.1.2 C.1.3 D.1.5
A.50mm B.100mm C.150mm D.200mm
A.光復(fù)用段保護(hù) B.光通道子網(wǎng)保護(hù) C.光復(fù)用段共享保護(hù)環(huán) D.光通道共享保護(hù)環(huán)