作者: R King
DOI:
关键词: Engineering 、 Hexagonal crystal system 、 Structural engineering
摘要: A flexible fitting for lawn sprinklers. The includes an elongated tube. pair of end members are secured to opposite ends the Each has external screw threading and integral hexagonal nut threadably connecting fitting. One is connected pipeline other sprinkler or riser. provides a connection between which capable yielding prevent damage injury in event riser accidentally struck.