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在JD-1A型调度绞车研制过程中,经过调查和对比,确定新研制的JD-1A型调度绞车应具备下列功能: 1)差动性能,以便自由下放和调速;
In the process of developing JD-1A dispatching winch, the newly developed JD-1A dispatching winch should have the following functions after investigation and comparison: 1) Differential performance for free decentralization and speed regulation;