具有连续循环系统和恒温系统的恒湿盐湿度发生器，首次在国内研制成功。
The humidity generator with saturated aqueous salt solutions has been developed for the first time in China. The generator contains a continuous moist air cycle system and a thermostatic system.
从钻井连续循环系统上卸扣卡瓦的工作机理入手，弄清了钻杆工作时的受力状态。
Based on the operational principle of on/off slip of continuous-circulation system, the forced state of drill pipe was clarified.
超音频齿轮淬火设备有独特的冷却循环系统，确保设备24小时连续工作。
Super Audio Gear quenching equipment has a unique cooling circulation system, ensure that the equipment 24 hours of continuous work.
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