WFE repair: say it isn’t true?

would that ever be relevant on a wiper?

the cema instrument I’m currently smacking my head against (percussive maintenance?) has a vfd on the roughing pump and that struck me as bizarre when I first figured out the wiring, and still doesn’t seem useful for distilling cannabinoids…

not sucking so hard can also be accomplished with a vacuum controller or a controlled leak.

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