PVC folding door with door physical light, heat, moisture, thermal insulation, fire retardant, sound insulation, acid and alkali resistance, corrosion resistance and chemical stability. PVC折叠门具有门体质轻,、保温隔冷热、防潮、防火阻燃、降噪隔音、耐酸碱、耐腐蚀等化学稳定性。
For a new electronic instrument, it is needed to make the test of environment ( temperature, moisture, vibration, impact, and transportation ) and basic safety ( insulation resistance, impulse withstand voltage, leaking current ) before using. 新的电子测量仪器在鉴定前要经过环境(温度、湿度、振动、冲击、运输)、基本安全(绝缘电阻、耐压、泄漏电流)的试验。