Plural of adjustor; multiple people or devices that adjust or make fine modifications to something.
From 'adjustor' + -s plural suffix. This is the standard plural form of the -or variant spelling of adjuster.
If you read insurance law carefully, you'll notice some firms use 'adjusters' while others prefer 'adjustors'—it reflects old law-firm traditions and the enduring split between -er and -or agent nouns in English.
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