资源类型

时间范围

首页 > 检索结果 >

Device for aeration of bottom layers of water in reservoirs, has valve whose lower end is designed with immersion in ground of reservoir, and storage tank that is placed inside cap made in form of inverted truncated cone, where inner surface of cone is made of reflective material 2024-10-02
Device useful for aerating the bottom layers of water in foil-clad fiberglass as reflective material, has storage tank in ball form with black outer surface, with inlet valve in the upper part and opening in the bottom with outlet 2024-10-02
Device for aerating bottom layers of water in reservoirs, has eccentric blade that is made in form of logarithmic spiral and mounted on air duct pipe with possibility of free rotation in cavity of lower chamber, and drain holes on the air duct pipe at the level of the bottom of the lower chamber 2024-07-09
Device for aerating bottom layers of water in reservoirs, has container that comprises opening in bottom with outlet into air duct pipe with outlet valve-sprayer and secured with cable to anchor on bottom of reservoir and comprises communicating chambers installed vertically on one axis 2024-07-09
HEAT-INSULATING CONCRETE obtained from a mixture containing foam glass quick-hardening portland cement 2024-01-09