The venturi is the abbreviation of the venturi. The principle of the venturi effect is that when the wind blows over the barrier, the air pressure is relatively low near the port above the leeward side of the barrier, thereby causing adsorption and causing air to flow.

It can use airflow to achieve the delivery of powder. Mainly to use its injection effect, such as vacuum cleaners, powder delivery, coolers, flow meters, dryers and so on. The injection pump of the chemical industry is also the principle, so the material mainly depends on the application place, and there are various kinds of iron, aluminum alloy and plastic nylon.

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