... B级分隔 B class division B级防火门 B class fire-proof door 乙类船 B class ship ...
基于6个网页-相关网页
... 隔音防火门 sound i ulated fire door; sound insulated fire door 级防火门 b class fire-proof door; fire door a(b) 矿井防火门 mine-fire door ...
基于2个网页-相关网页
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