• 1. Bring Layer Forward: 图层置上 | 上移一层
• 2. Bring Layer to Forward: 上移图层

• 1.The paper introduced the functional block schematic of realizing the whole ONT in APON based on the network model of B-ISDN and bring forward path layer system design according to the protocol.
  文中在讨论宽带综合业务数据网（B-ISDN）网络分层模型的基础上，介绍了实现APON系统中ONT的总体方案功能模块图，并根据协议和ONT技术要求提出了通道层硬件电路设计。
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• 2.Simulation results may bring forward reasonable Suggestions for the design of protective layer mining and relief-pressure gas drainage.
  模拟结果可为保护层开采及被保护层卸压瓦斯抽采设计提供合理建议。
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