Make the mobile book box to become an effective approach for book circulation in elementary school libraries.
漂流书箱成为小学图书馆提升图书流通率的有效方式。
Properties : The working principle of air conditioner is that air refrigerates in the evaporating box through circulation.
性能特点：空调的使用原理是让环境中的空气在蒸发箱中循环得以制冷。
There are some problems in modelling karst water circulation using hydrological model as lack of information of groundwater distribution in karst system (black box or grey box).
由于岩溶地下水分布难以量测，岩溶水文系统多为黑箱或灰箱，采用岩溶水文模型量化其水循环过程常存在许多疑难问题。
The utility model discloses a dry-cleaning machine with steam flow circulation distilling box which belongs to washing equipment.
本实用新型公开了一种带汽流循环式蒸馏箱的干洗机，属于一种 洗涤设备。
These three simple objects attached to each other with a transparent circulation area next to stair case box, in the sixth floor and in the ground floor.
这三个简单的方块在六楼和一楼，利用楼梯旁边的透明的连通区域相互连接。
These three simple objects attached to each other with a transparent circulation area next to stair case box, in the sixth floor and in the ground floor.
这三个简单的方块在六楼和一楼，利用楼梯旁边的透明的连通区域相互连接。
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