main cycle meaning in English

大循环主循环
大周期, 主周期
主旋回

Adoption of a system essentially based on two main cycles , undergraduate and graduate
采用实质上是基于两个主要周期的系统,大学生和研究生。
This article firstly describes mrpii and jit on their history , development , background , composition and control procedure , run system as well as characteristic function and makes complete centra - analysis with study on features and applicable range of two management methods , then presents mixed use of mrpii and jit with its main characteristics , this article emphasizes mrpii / jit mixed use thoughts in application of manufacturing planning management , raises application method and main cycles
本文首先对mrp和jit的发展历史、产生的背景、要素构成及控制方式、运行机制与性能等方面进行了充分的对比分析，研究了两种管理方法的特点和各自适用的范围，提出了mrp和jit混合运用的方法及其主要特点。重点研究了mrp / jit混用思想在生产计划管理上的应用，提出了应用的方法及主要环节。