Active support and control of ultra-thin mirror is the key technology of the ultra lightweight optical system.
而超薄反射镜主动支撑和控制是实现超轻量化反射光学系统的关键技术。
Nautical The system of ropes, chains, and tackle used to support and control the masts, sails, and yards of a sailing vessel.
索具；帆缆；支索：用于支撑或控制航船的桅杆、帆或帆桅的绳索、链条或滑车系统。
Nautical The system of ropes, chains, and tackle used to support and control the masts, sails, and yards of a sailing vessel.
索具；帆缆；支索：用于支撑或控制航船的桅杆、帆或帆桅的绳索、链条或滑车系统。
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