Each product has at least one core demand to solve some aspect of the user's needs, the greater the value of the core demand for the existence of the product is also the greater the value of the resources can be invested in the more non-standard products refers to not in accordance with the national promulgation of the unified industry standards and specifications for the manufacture of products or equipment, but according to their own uses need to be designed and manufactured by themselves and the appearance of the product catalog of equipment is not in the country. The products or equipments are not manufactured according to the unified industry standard and specification issued by the state.
The core product is the body of equipment, if the bidder bidding for the body of equipment belonging to the same brand, it can be recognized as belonging to the same brand of the bidder.