Provide stable URLs so users looking for old pages can find them.
提供稳定的 URL，这样需要使用旧网页的用户就能顺利找到这些网页。
The heat supply network currently has its stable users, and as new networks are built and old ones are constantly renovated and extended, income from heat supply will increase greatly.
供热管网目前已有稳定的用户，随着未来新管网建设不断增加、老管网不断改造扩建，供热收益会有较大幅度增长。
The stable product quality and strict working attitude always let users in use realized that what is real benefits. Welcome the new old customer consultation discussion!
稳定的产品质量和精益求精的工作态度始终让广大用户在使用中领悟到什么是真正的实惠。
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