产品生命周期管理系统 PLM ; Product Lifecycle Management ; Extech PLM ; Product Life Management

渐近周期系统 asymptotically periodical system

区间周期系统 Interval periodic system

广义周期系统 Periodic descriptor systems

无空转周期系统 [计] system without idle period

生命周期管理系统 Product Lifecycle Management ; Information Lifecycle Management system ; PLM ; Product Life Management

周期测量系统 period measurement system