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Molecular formula : MW : CAS :
nature : a common bimetallic thermometer. The double major is made of metal sheets or helical coils or solenoid-shaped, with one end fixed and the other end connected to the lever or target. If the spiral circle of the inner surface of brass, except for the surface is steel, the heat will stretch out through the drive led pointer. Sometimes I can order the contrary, the heat will be a string.
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