    ǽˮɰˢ
    (1) ԻĴ
    שǽʱǽ澡ܰˮǽ׼ʩƽֱΪ湤ʩڽּۡܶܲ۵Ӧϡ͹ȱǲҪˢһ1:4107ˮҺ Ȼ1:3ˮɰƽÿ޲10mmΪˡŴӦΪһר˸1:21:3ˮɰϣﵽһǿȺĨ㣬23dʼש
    (2) ҷñֲƽѹ⡣
    (3) ÿĨҺΪ57mm
(4) ˮɰˮɰĨҲ㣬ӦǰһĨҲ󣬷ͿĨһ㡣

