The techno-material bidding business is differing from the other trade, because of the internality character. 由于技术物资的内在特征，其有别于其它行业招标采购。
The bid-invitation procurement entity may not compel bidders to form a consortium for joint bidding, nor may it restrict the bidders from competing with each other. 招标采购单位不得强制投标人组成联合体共同投标，不得限制投标人之间的竞争。
