Why cross benches are used in airlocks?

Microbiology
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why cross benches are used in airlocks?

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Generally to spend some time to open next door because one door should open at a time in air lock.

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3

Cross benches are demarketing lines. These are also used to wear the booties, leg covers appropriately without contaminating the other garments.

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4

@drinam23 is also correct.

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