A.30% B.20% C.40% D.60%
A.1.5m B.2m C.1m D.0.5m
A.光纜接續(xù)長(zhǎng)度 B.光纖在接頭盒內(nèi)的盤留長(zhǎng)度 C.光纜施工接續(xù)時(shí)所需的長(zhǎng)度 D.富余長(zhǎng)度