久久久久久久久久久身材好_免费中文字幕在线观看_色婷婷精品久久二区二区蜜臂av_国产在线精品一区二区三区_来一水AV@lysav

Oven using hot air circulation principle, the internal temperature of the oven, with high performance of insulation materials, ensure the temperature loss effectively, thus improve the thermal efficiency of the machine, the machine automatic temperature control system is adopted for the heating system, with high performance control switch, improve the accuracy of temperature control, so as to improve the product percent of pass.