I. Introduction

How to accurately and effectively establish the part information model is the core content of CAD/CAPP/CAM integration. At present, the part information model is based on feature modeling technology. The most common practice is to first build a feature libra.......

A new type of compound fertilizer with uniform and smooth particles, with molten pores and no caking. Although the price per ton is more than 100 yuan higher than that of ordinary fertilizer, it is particularly popular among farmers. What gives the charm of this fertilizer is the high-towe.......