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◆ 可选带以下功能： Optional with the function as follows:
→ 全波调速 Full-wave speed control
→ 半波调速 Half-wave speed control
→ 通断功能带可变电阻输出 On-Off version with Passive linear potentiometer
◆ 可选带以下附件： Optional with the accessor as follows:
→ 初始电压微调节旋钮 Knob for adjusting start voltage
→ 可控硅外置适合更大电流并可附带散热片 External Triac version for high currents additional with heat sink