Protection grade 防护等级 ; 防腐等级 ; 防爆标志 ; 防水防尘等级 Pay grade 工资等级 ; 薪酬等级 ; 工资级差 ; 付薪等级 .
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加强型钢质热缩片管主要用于地形复杂、穿河过江、气候恶劣、防腐等级高的地区使用。
The reinforced type steel heat-shrinkable finned rube is mainly used in such places which have complicated topography, bad weather and high grade of anticorrosion, and cross the rivers.
ACQ防腐处理材等级由锯材的不同等级决定。
The grade of ACQ antiseptic material is due to the class of the wood.
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