Sample tube has a 200W chrome steel strip heater and a hingedcover to maintain even heat distribution.
样品管下端有一个200W铬钢加热棒和铰链来进行样品加热和热扩散分部。
2
Frequently it has a hinged glass cover to hold copy flat, and may have a removable section in which a transparency holder can be positioned for back-lighting illumination.
一般都备有铰链着的玻璃盖面，以把稿件夹平。有些更可以换上透明片架，在后面打灯照明。
3
The housing contains a hinged dust cover that provides protection in industrial environments.