发明授权
US3815641A Concrete pipe with splayed socket 失效
混凝土管与分离式插座

Concrete pipe with splayed socket
摘要:
A concrete pipe for laying in bend of a pipe line. The pipe is of straight cylindrical, spigot and socket type. The socket is deliberately splayed so that socket axis is inclined at acute angle to longitudinal pipe axis to enable strong joint between successive pipes laid at angle to one another.
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