The utility model has the advantages of high bearing, high thermal efficiency, etc., and the inner tube is not easy to break.
本实用新型具有承压高、内管不易破碎和热效率高等优点。
The utility model has the advantages of high bearing, high thermal efficiency, etc., and the inner tube is not easy to break.
本实用新型具有承压高、内管不易破碎和热效率高等优点。
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