ការណែនាំអ្នកប្រើប្រាស់ប្រព័ន្ធ AIPHONE LEF-LD Loudspeaker Intercom
LEF-LD Loudspeaker Intercom System User Guide LEF-LD Loudspeaker Intercom System LEF Loudspeaker Intercom System for Long Distance and Elevator Applications LEF-3-LD, LEF-5-LD, LEF-10-LD, LEF-10S-LD LEF-3C-LD, LEF-5C-LD, LEF-10C-LD INSTRUCTIONS The LEF-LD system is designed with the capability to operate at greater…