The flattening is done by crushing tubes between two parallelsurfaces.
使用两个平行面的压扁机将管材压扁。
2
Gas Transmission Rate (GTR) : the quantity of a given gas passing through a unit of the parallelsurfaces of a plastic film in unit time under the conditions of test.
Gas Transmission Rate (GTR) : the quantity of a given gas passing through a unit of the parallelsurfaces of a plastic film in unit time under the conditions of test.