សៀវភៅណែនាំអំពីការកត់ត្រាប្រព័ន្ធទំនាក់ទំនងឥតខ្សែ ស៊េរី TANDD RTR500B
TANDD RTR500B Series Wireless Communication Logging System Safety Precautions and Instructions The following items should be strictly obeyed for the safe usage of the product, and for protecting yourself and other people from bodily harm and/or damage to property. Before…