... concrete pump spare parts, 1.Profile and Products: Our company is one of the leading wear-resisting concrete ... being in this filed for over 10 years. Our products include delivery pipes, elbows, reducers, couplings, rubber hoses, ... PipeTechnology: It is quenched and carried out carburizing chemical treatment on the inner wall.It has a ... 3000mm concrete pump spare parts(manufacturer,not trading company)