外部框架为镀锌，涂漆或不锈钢。镀锌或不锈钢的风叶带双层结构。免维护的不锈钢轴套和转轴。
Outer frame of galvanized, painted or stainless steel. Blades of galvanized or stainless steel with double sheet construction, silicon sealings. Maintenance-free stainless steel bearings and shafts.
锌粉是一种带蓝灰色或浅灰色粉末，可用于镀锌、铸件、锌锰干电池、肥料、颜料等工业。
Zinc powder is a kind of powder with blue and grey or light grey. It is usually used in electroplating, casting, zinc-manganese dry cells, fertilizer and color industry.
带材应该是钢带、镀锌钢带、铝带或铝合金带。
Tapes shall be of steel, galvanized steel, aluminium or aluminium alloy.
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