电弧电压：一般认为电源正常输出电压即为切割电压。
Four, arc voltage: generally believe that the power supply is normal output voltage for cutting voltage.
切割机的气源部分应远离明火，并在其附近放置性能正常的二氧化碳或其他相应的灭火装置。
The prologue of air had should be far away from fire, and in its place near normal carbon dioxide or other performance of the corresponding fire extinguishing devices.
结果：经修复的残冠残根能恢复牙体牙冠的生理形态和正常的切割、咬牙合咀嚼功能。
Results:The repaired residual coronas and roots recovered their physiological functions and the normal function of cutting, chewing and artculating.
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