Extreme environments such as polar regions and deep seas place special requirements on equipment. The ChTZ T-15M crawler used in the Russian Arctic mining area can operate continuously at -60 ° C, and the hydraulic system is equipped with self-heating function. The deep-sea mining robot "Jiaolong Exploration Sea" can withstand pressure up to 110MPa and is equipped with a mechanical arm to collect ore at a depth of 6,000 meters.