Cost-Effective: lights and batteries are maintenance-free life, no maintenance costs.
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The tubes help protect the concrete from de-icing chemicals, potentially reducing maintenance costs, and no internal rebar is needed.
布套帮助保护混凝土不受溶雪剂侵蚀 可减少维护费用 并且不需要内部钢筋。
The maintenance costs are increasing because multiple copies of similar or the same services are being maintained, and there's no control over such services, which halts further development.
维护成本与日俱增,因为要维护相似或相同服务的多个副本,并且不存在对此类服务的任何控制,从而进一步阻碍了开发。
Carrying that custom work can become a major cost, though, and there's no one to share the costs of maintenance.
但是意味着自定义工作有可能成为主要的成本,而且没有人共同承担维护成本。
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