... 乙类放大器，B类放大器 class B amplifier B级绝缘 class B insulation 乙类调制，B类调制 class B modulation ...
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Features:The insulation class is B; the protective class is IP44.
特点：绝缘等级为B级，外壳防护等级为IP44。
Y series three phase induction motor (380v IP23) is low voltage motor for normal use. The basic protection class are IP23, insulation class is b.
系列三相异步电动机(380 V IP23)是一般用途的低压三相笼型异步电动机，基本防护等级为IP23、绝缘等级为B级。
SZKX series has self-cooling sealed structure and in use for B-class insulation material, so possesses features of less maintenance, reliable operation and long life.
本电动机采用封闭型自冷结构和B极构缘材料，维护少、运行可靠、寿命长。
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