Damage rate of the electromagnetic drive lock does not exceed 1% within three months, not exceed 1% within half a year and not exceed 1% within a year. The free warranty is one year. (If it is damaged, employees cannot open and close the cabinet door to take the lamp for going up and down, affecting normal production progress of coal mine.)

Damage rate of the electromagnetic drive lock does not exceed 1% within three months, not exceed 1% within half a year and not exceed 1% within a year. The free warranty is one year. (If it is damaged, employees cannot open and close the cabinet door to take the lamp for going up and down, affecting normal production progress of coal mine.)

The damage rate of the electromagnetic drive lock within three months is not more than 1%, the damage rate within half a year is not more than 1%, and the damage rate within one year is not more than 1%, and the warranty is free for one year. (If it is damaged, employees will not be able to open and close the cabinet door and take the lights to get in and out of the well, which will affect the normal production progress of the coal mine.)

The damage rate of the electromagnetic drive lock within three months is not more than 1%, the damage rate within half a year is not more than 1%, and the damage rate within one year is not more than 1%, and the warranty is free for one year. (If it is damaged, employees will not be able to open and close the cabinet door and take the lights to get in and out of the well, which will affect the normal production progress of the coal mine.)

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