Can anyone tell me where the calibration screw is on these things???
I've got two that I use for instructional purposes but one of 'em don't jive with the other
Can anyone tell me where the calibration screw is on these things???
I've got two that I use for instructional purposes but one of 'em don't jive with the other
"I would feel more optimistic about a bright future for man if he spent less time proving that he can outwit Nature and more time tasting her sweetness and respecting her seniority"---EB White
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