发布时间:2025-02-01 16:17:57
1.防止水分散发,起到密封的作用;
2.防止食物在储存时失去原有鲜味;
3.隔离空气,防止食物氧化(受到感染);
下图是某工厂厂房的平面图是按照实际的长和宽各缩小到原来的万分之一后画出的这个厂房的实际占地面积
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