primary lifting elevator 第一升运器
primary grain elevator agent 主要谷物电梯代理商
primary grain elevator manager 的主要谷物电梯经理
primary grain elevator operator 基层粮食电梯操作员
Multi-level velocity mode is an important feature of the advanced elevator, and the simulation of elevator running is the primary part of the elevator group control research.
多速度模式运行是现代中高速电梯的重要特征，而运行仿真是电梯群控仿真研究的基本环节。
The company was looking for increased belt lifetime, reduced belt wear, and decreased maintenance downtime on a very critical high wear application: the primary wash elevator for tomatoes.
该公司正在增加皮带使用寿命，减少皮带磨损，减少维修停机时间：在一个非常关键的的高耐磨应用对西红柿的主要洗电梯。
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