грязевые насосы и инженеры
Understanding Down the Hole Drilling Rigs An Essential Tool in Modern Mining and Construction
The reason:
Inlet valve is not open or has silted
Suction line resistance is too high or blocked
Suction height is too high
The reason:
Inlet valve is not open or has silted
Suction line resistance is too high or blocked
Suction height is too high