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采矿和选矿机械制造科学研究设计院改进了批量生产的-4和-4型风动爬罐,同时为高天井掘进研制了-400型电动爬罐。爬罐的技术性能列于下表。院试验工厂制造了-4A型爬罐样
The Mining and Dressing Machinery Manufacturing Research Institute has improved the mass-produced -4 and -4 wind-driven climbers while the -400 electric climber was developed for high-pitching. The technical performance of the canister is listed in the following table. Factory test factory-made -4A-type crawler-like