短语词组短语ChinaJoy B TO B 即针对厂商洽谈合作的综合商务区B to B Marketing 企业对企业营销B to B commerce 企业间商取引B to B Model BtoB 模式B TO B CONN 型号b to b mode btob 模式B to B Connector 松下板对板连接器b to b logistics btob 物流b to b promotion 企业对企业促销 返回 B to B