外壳：采用优质热镀锌钢板制成，具有优良的耐大气腐蚀性能，进风口和出风口外形尺寸相同，可与风管直接相连，以便于安装。
Housing: Galvanize steel sheet material could be able to bear corrosive. Same size for the inlet and outlet can install conveniently. Connecting to the piping directly makes for installation.
进风口和出风口外形尺寸相同，以便于安装。
Same size for the inlet and outlet can install conveniently.
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