Personal protective equipment against falls from a height - Retractable type fall arresters.
防止从高处跌落的个人防护设备。收放式防跌落装置。
Mobile crane is a general or special the heavy lifting the chassis on the work and equipment, cranes, retractable type mainly adopt the oil tank movement.
汽车起重机是在通用或专用在载重汽车底盘上装上起重工作装置及设备的起重机，主要采用伸缩式臂架，油缸变幅。
Due to the particularity of retractable structure, design of this type of project must greatly differ from that of normal structure and be more difficult than the latter.
由于开合结构的特殊性决定这类工程的设计不同于常规结构，存在较大难度。
Aiming at the fractured mechanism of mine shaft lining under the condition of stratum subsiding, a new type of retractable drilling shaft lining structure was proposed.
针对地层沉降条件下煤矿立井井壁的破坏机理，提出了一种新型可缩性钻井井壁结构。
The application of "new type retractable seal rings" can greatly increase the safety and efficiency of the steam turbine.
新型“可调式汽封”的使用，使在运机组的安全性和经济性得到良好改善。
The application of "new type retractable seal rings" can greatly increase the safety and efficiency of the steam turbine.
新型“可调式汽封”的使用，使在运机组的安全性和经济性得到良好改善。
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