发明名称 Plastic sewer-access pit - has positioning devices keeping it upright, bottom section with unions for pipes and PVC shaft section
摘要 <p>Plastic access pit for sewers etc. comprises a bottom section with unions for pipes, and a shaft section. Positioning devices are included to help keep it upright, typically comprising an upwards-sloping peripheral edge. The shaft section can be of polyvinyl chloride, with an elastic rubber edge at the top, while the bottom section can be of heat-hardened material, pref. glass-fibre-reinforced polyester.</p>
申请公布号 NL9001480(A) 申请公布日期 1992.01.16
申请号 NL19900001480 申请日期 1990.06.28
申请人 WAVIN B.V. TE ZWOLLE. 发明人
分类号 E03F5/02 主分类号 E03F5/02
代理机构 代理人
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