| 摘要 |
he invented oval cistern is of reduced width, made from polyethylene and provided with reinforcing ribs. It is a combination of curvature radii, namely it has -excepting the upper and lower sides- all its sides curved. The cistern 1 bears at selected points the supporting feet 2. Reinforcing ribs are manufactured at the top of the cistern 3 in respect of the number of the supporting feet in use. At the top, there is the opening secured with a cap 4 and meant for the replenishment of the cistern. At he bottom, there is manufactured a planar surface 5 whereto special rings are adapted for the fitting of the liquid outlet and residues outlet accessories 7. At the sides there are the grips 8 destined for the transport of the cistern. The reduced width enables the cisterns of any size to pass through openings of less than 90 cm in width; the size of the cisterns is selected with the purpose of saving space during transport. |
