| 释义 |
- 上游作业：指在供应链中，从原材料采购到生产前的各项活动，包括采购、物流、生产准备等。
1 ?上游作业 ... upstream company 上游公司... upstream operations 上游作业... upswing n.回升时期,上升,向上摆动,跃进上升,...
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A company having operations downstream as well as upstream. - 2
Alot of noises accumulate on the upstream channel in HFC (Hybrid Fiber-Coax) system, which caused the difficulty in bi directional operations, Therefore, suppressing them is very difficult. HFC上行通路汇集了大量的各类噪声，严重影响着其双向业务的开通，如何对这些噪声进行抑制是个难题。
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