A basement wall is thus one kind of retaining wall. Pumapunku was a large earthen platform mound with three levels of stone retaining walls. Spacing is especially useful for retaining and recalling new material. This is the stress exerted on retaining walls. The prototype withstood 10000 charging cycles while retaining substantial capacity. The fibres helped the pads absorb while retaining shape. Some bacteria have cell walls which are particularly adept at retaining stains. The outside retaining wall and catch fence were replaced. This reduction lowers the pressure on the retaining wall. The outside retaining wall was also replaced. The dam worked by retaining stormwater runoff in a reservoir. EnCana Corporation retaining its natural gas business. The mount is quick-detachable and capable of retaining zero after remounting. Plants that were better at retaining insects or water therefore had a selective advantage. These stages are critical to retaining customers.