例句 /

Steam heating : Adopting total copper tube bending method without welding, so it's stronger and can extend the heater's life.

Steam heating : Adopting total copper tube bending method without welding, so it's stronger and can extend the heater's life.

蒸气加热,采用整支铜管弯曲成型未经焊烧保持铜管耐久不破,使加热器寿命延长。