The system makes use of the tubing string as heat source body to transfer the electric energy into heat energy to heat the liquid in the tubing.
该装置利用油井中的油管柱作热源体将电能转化为热能，加热油管内的液体。
The system makes use of the tubing string as heat source body to transfer the electric energy into heat energy to heat the liquid in the tubing.
该装置利用油井中的油管柱作热源体将电能转化为热能，加热油管内的液体。
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