Bimetallic thermometer with teeth ( The screw thread) And no teeth ( The screw thread) , and teeth ( The screw thread) Bimetallic thermometer and the activities of the tooth, The screw thread) With fixed teeth ( The screw thread) The points. Fixed tooth tooth head ( The screw thread) On the sheath maerial, have certain sealing; Activity of teeth ( The screw thread) Can be on the sheath maerial of activities, some even are sliding, convenient for reading. The following is a bimetallic thermometer activity tooth ( The screw thread) Display, convenient you to understand:
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