A. 螺杆折式堵漏板; B. 圆形折式堵漏板; C. 椭圆形堵漏板; D. 方形堵漏板。
A. 1.00h,1.00h,1.00h B. 1.00h,1.50h,0.50h C. 1.50h,1.00h,1.00h D. 1.50h,1.00h,0.50h