Things to write when the samples are baking

Oh, whir and hum and hum and whir
My vacuum pumps shall have their word
The table hums and vibrates tense
The test procedures shall commence

The pressure made is high and bad
We turn the pump off, tired and sad
We open up the nuts and bolts
Remove the cover, see it molt

The problem now is crystal clear:
Three inches gap, where none should leer
Replace the seals in manner good
The close the pump, re-place the hood

Leave overnight the pump to pump
And see tomorrow pressures plum