A.20 B.30 C.40 D.50
A.15° B.30° C.45° D.60°
A.光纖長度應(yīng)抽測80% B.用0TDR法測量單盤損耗時應(yīng)加標(biāo)準(zhǔn)尾纖 C.光纜護層應(yīng)進行耐壓測試 D.應(yīng)進行偏振膜色散測試