(1) zabin kayan aiki。Akwai wasu matsaloli a cikin zaɓi na kayan aikin magani, kamar zaɓi ta ƙwarewa (ba tas da lissafi na ainihi ba, ko ƙarancin ƙididdigar bayanai), biɗan ci gaba, da rashin isasshen bincike na bayanan jiki, waɗanda ke shafar…
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