When on a spacewalk, astronauts use safety tethers to stay close to their spacecraft.
2
钢丝绳股绳张力测控系统较大幅度提高了钢丝绳的安全性能和使用寿命，具有较高的实用价值。
The tension monitoring system of strands and rope can increase safety property and service life of wire rope by a big margin, and has higher application value.
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