able to penetrate gaps that are as small as one micron, one-millionth of an inch
1μm ≠ 0.000001"
1μm ≈ 0.00004" or 1/25000"
0.000001" ≈ 25nm
@gbj_tester started
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1μm ≠ 0.000001"
1μm ≈ 0.00004" or 1/25000"
0.000001" ≈ 25nm