发明授权
US4238934A Constant temperature box 失效
恒温箱

Constant temperature box
摘要:
A constant temperature box comprises a body and a lid for closing the body at an upper opening thereof, which are of adiabatic construction, and a container which is made flat and small in height and supported horizontally at the upper portion of the body the container serving as a cooling or heating source to cool or warm the content of the box.
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