news

• common english conversation in canton fair

  nice to meet you . i’ve heard a lot about you. 很高兴认识你，久仰大名。? we offer you our best prices， at which we have done a lot business with other customers.我们向你们报最优惠价，按此价我们已与其他客户做了大批生意...

  2017-06-29 more...
• summary of core related knowledge

  one. what is the effect of heavy or light electrode material on the sizing of positive and negative electrodes? answer: 1. when explaining this problem, you must understand how the battery is composed!! the main components of the battery are: positive plate,...

  2017-06-29 more...