    ̵š
    (1) õĲϺͰ䡢飬Ӧұ׼Źʩչ淶(GB50204-92)ейع涨ִС
    (2) õʯӦʵӦ15mmȵ2/3
    (3) ıһ㲻ӦC20ʱ̮ȲӦ3cm񵷱ʵ
(4) ӦڳǰĨƽǰѹ⹤

