(1) Automatic water supply and overfall; also applicable for various pressures, like the tap water, water pipes of self-built wells in the countryside and the self-supply water towers of families.

(2) The overfall can expand the joints, and the line of air vents can show necklace image.

(3) Design of pipes such as intake pipe, overfall pipe and drainage pipe of storage reservoir or water tank in building water system cannot often meet the fact according to the experiments.

(4) The intrinsic grille pattern forcing evacuation is instead by overfall pattern controlling one . This can improve the milling of the granule and capacity is increased by 15-20%.

(5) Some penetrating cracks on different extent were found in bracket support stressing area ofradian gates of overfall dam piers of Lalang Hydropower Station.

(6) Based on the analysis of the control demands of the exterior overfall arc water gate, control system buildup, design of the control mode and the realizable control function are put forward.

(7) Yushugou reservoir project is built in our country, it is the first overfall Concrete Face Rockfill Dam(CFRD) which has been carried out flood discharge.

(8) For this reason a renovation design of building a prism shape of overfall weir to stop the water flow and optimal measures were proposed and adopted. Simulation experiment resu...

(9) If it is not timely found, the copper pipe will fracture and the water will be overfall.

(10) This paper introduces the structure, work laws and process of overfall valve and rotate speed control valve in a lately devel oped cleaner.