求翻译：电焊机启动后，必须空载运行一段时间。调节焊接电流及极性开关应在空载下进行。直流焊机空载电压不得超过90V，交流焊机空载电压不得超过80V。是什么意思？

No-load operation for some time after the start of the welding machine. Adjust the welding current and polarity switch should be under no-load. DC welding machine no-load voltage shall not exceed 90v AC welding machine no-load voltage shall not exceed 80v.

After starting the machine, welding must be no-load running for a period of time. Adjust welding current and polarity switch should be in no-load. No-load voltage DC welding machine may not exceed 90 V AC welding machine, no-load voltage V shall not exceed 80.

After the electric welding machine starts, must lost motion period of time.The adjustment welding current and the polarity switch should carry on under the idling.The direct-current welding machine idling voltage does not have to surpass 90V, exchanges the welding machine idling voltage not to have

Welding machine starts, runs must be unloaded for some time. Regulation of welding current and polarity switch should be carried out under no load. No-load voltage not exceeding 90V DC welding machines, AC welding machines no-load voltage not exceeding 80V.

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