the design of all kinds of civil engineering and construction of all construction, land or park or playground, golf course, in order to cause it to be buried in the ground, in the reason of underground water drainage, or in order to set up and uc0c1ubd80ub97c opening on the side of the opening. on the side of the direction of the curvature of the frame, with a certain form of the first drain partthe government and all the times to complete certain curvature to form a frame, and a part to be additional to the opening of the opening of the second part to form a drainage containing multiple copies of the shell; and the water inlet is connected to the first extension level. it in the other group, and the structure and the other of the first and with the shell and the connection to the side of the road to be connected with it in the same direction, with the gap is to be formed through the drainage work, and the government and the people the cycle of the horizontal direction of the water supply pipe form a complete assembly will be the characteristics of the water supply pipe to the drain from the assembly.
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