Three sides sealing is common product, and the customized heat sealing device is needed for the four sides sealing.
包装成品的形状为三边封或四边封。 三边封为常规产品，四边封需特殊定制热封器。
The fireproof cover is formed by combining a fire sealing and heat insulating device and a filter fume extractor.
防火罩由封火保温装置和过滤排烟装置两部分组合成。
The fireproof cover is formed by combining a fire sealing and heat insulating device and a filter fume extractor.
防火罩由封火保温装置和过滤排烟装置两部分组合成。
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