防護等級和防爆等級的說明：防護等級說明： IP（INTERNATIONAL PROTECTION）防護等級系統(tǒng)是由IEC（INTERNATIONAL ELECTROTECHNICAL COMMISSION）所起草。IP防護等級是由兩個數(shù)字所組成，第1個數(shù)字表示離塵、防止外物侵入的等級，第2個數(shù)字表示防濕氣、防水侵入的密閉程度，數(shù)字越大表示其防護等級越高，兩個標示
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