... , especially wear-resisting elbow < http://www.naimo.org.cn/ >, for considering its use security, and service life, emphasis on improving ... impact resistance, corrosion resistance, self-lubrication, resistance to bond, easy for construction, and many other advantages, solve the PCCP pipe, steel ... high carbon steel;2, impact strength is the head of the listed plastic, for PC 2 times, ABC 5 times, and can ...