The series product USES steel tube to connect, electrical inlet - wire must be noted.
此系统产品正常为钢管连接，电缆进线请注明。
Product introduction: RX21 series resistor is lacquered wire wound resistor.
产品介绍：RX21型电阻器为被漆型绕线电阻器。
Product introduction: RX21 series resistor is lacquered wire wound resistor.
产品介绍：RX21型电阻器为被漆型绕线电阻器。
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