A.施工單位每組道岔抽檢3個道釘 B.施工單位每組道岔抽檢3根岔枕的道釘 C.施工單位每組道岔抽檢6個道釘 D.施工單位每組道岔抽檢6根岔枕的道釘
A.施工單位每千米抽檢3個道釘 B.施工單位每千米抽檢3根軌枕的道釘 C.施工單位每千米抽檢6個道釘 D.施工單位每千米抽檢6根軌枕的道釘
A.20 B.40 C.60 D.80