Third, take fingerprint time clock, if the print machine not reflect, may need to check the following situations: (1) fingerprint machine is in working condition, including circuit is normal; (2) the finger is too dry, if too dry can through the ha tone increase fingerprint humidity; Four, do not force is too large press fingerprint machine, especially with the tips of your fingers and nail part to dig mirror. This will cause the deformation of the fingerprint, influence contrast results, for...
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