What's difference between suction hose and discharge hose ?

What's difference between suction hose and discharge hose ? 

The main difference between suction hose and discharge hose is that the suction hose doesn't collapse under vacuum pressure.

For example, the difference of rubber suction hose and discharge hose is that the suction hose is reinforced by multi layers fabric cords with 1 or 2 steel wire spiral,which can improve the anti-bending performance and strengthen the hose structure and extend service life. Then the suction hose can be used in both positive pressure and negative pressure working environments for sucking and discharging industrial water and neutral liquid in normal temperature. It is widely used in mine, factory, agriculture, civil and architectural engineering. Additional, it can be used as water conveying hose for agriculture irrigation.

While the rubber discharge hose is just reinforced by multi layers of fabric cords and this hose just can be used to discharging water, mud or bulk material, easily sucked to be flat without spiral steel wire to strengthen.