Tamper proof means it is not possible to tamper with something.
Tamper evident relates to devices that reveal if something was
tampered with.
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The past tense of tamper is tampered.
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I believe that tamper is 50mm
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Anything which is tamper proof cannot be altered, changed or
messed about with.
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A tamper is typically used in projects that include pavers or
asphalt. The tamper tamps down sand and gravel and helps to level
the ground for the insertion of pavers or bricks or asphalt.