专利名称：PLASTIC-JACKETED FILTER UNDERDRAIN BLOCK
发明人：GRESH, Richard, D.,NETHERLAND, Robert, B.申请号：EP90906571.0
申请日：19900131
振的组词
秋天的变化有哪些公开号：EP0509988A1
公开日：
茶叶蛋怎么煮好吃>环球视野
19921028
专利内容由知识产权出版社提供
江南作家摘要： Describes a block (20) of filter underdrain plastic shell pre-cast for downflow filtration units cement. The envelope (26) acts as a mold for the concrete (36) and is part of the underdrain block (20). Thus one can manufacture and transport to the filter construction site plastic molds (26) light and inexpensive, which is filled with concrete, which is dried and is then placed in the unit filtration (8) to obtain an underground drainage system. underground drainage block (20) can be equipped with handles (44) to facilitate their handling and provided with alternating vertical notches on the outer vertical surfaces of the plastic casing (26) which creates an interlocking system whereby each block (20) during installation in the filter unit (8) being interconnected with the adjacent lateral blocks to create a uniform filter drainage system and interconnected resistant lifting and displacement of individual blocks during washing operations against the current.
申请人：TETRA TECHNOLOGIES, INC.
什么是关联词语
关于体育的名言地址：25231 Grogans Mill Road The Woodlands, Texas 77380 US
国籍：US我的身体教案小班
代理机构：VOSSIUS & PARTNER 更多信息请下载全文后查看
