过滤测试头通过带状加热器加热，同时通过一个数字控制器和自动调整装置精确地控制整个过滤测试头的温度。
The filter test head is heated with band heater and a digital controller regulates the temperature of the entire filter head very accurately with auto tuning function.
线状（带状）加热器是将发热线（带）端部接上导线，并对连接外进行密封而制成的电加热器。
The kind of product joins lead onto the end of the heating wires and airproof the joint.
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