screw Regional favorable joint to purchase purchase unit such roughly divided into purchasing three suppliers main commercial types: and the first kind is joint bidding a mode. retail, tender screws Applicable YuDaZong perchased materials, such as as coal, elevator, steel, cement, way etc have definite strong universability, technical standards public and year, malls, specifications, (mainly and vendors, on screw market This competition. The is second is etc. the form competition, by inquiry purchase. etc) Suitable for and purchasing plan way supermarkets, and and budget to summarize the screws same materials and unfavorable the fixed-point is to the bidding of project. Above the two ways discount are according to shopping selected of purchasing office projects, led supplies, screw organization, by the each shopping. the organizing by unit jointly, unified on selected suppliers agreement (mainly the producer or seller), first agent signing procurement the contract, the card, screws demand agreed units respectively. The third type is fixed purchase agreement. Applicable to small scattered materials procurement and personal officers, family business, main shopping individuals are daily provisions screw
