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Although vacuum pumping period is only one of the parameters of vacuum method gas Permeation instruments, it should be specially noted by the users; otherwise, not only accuracy of the test data is lowered, mistaken test data will sometimes appear as well. For the application of VAC-V1, Labthink has provided empirical data list of vacuum pumping period for the user references. It is comparatively a reasonable way to decide the period of vacuum pumping according to empirical operations.
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