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Graduated droppers work by creating a partial vacuum above the glass or plastic tube. Releasing the vacuum draws the liquid in or dispenses it.

Ilana titẹ sita gbigbe omi jẹ iru titẹ sita ti o nlo omi bi alabọde tituka lati gbe aworan ati ọrọ si iwe gbigbe ati gbigbe fiimu pẹlu awọn ilana awọ..

PET raw material is a milky white or light yellow highly crystalline polymer with a smooth and shiny surface.

The lotion pump, also known as the push-type lotion pump, is a liquid dispenser that uses the principle of atmospheric balance to pump out the liquid in the bottle by pressing, and replenish the external atmosphere into the bottle.

Know about the history and process of injection blow molding.