有几项研究结果称，捕集上述排放气体可采取安装设备、维护保养等装置，其收回期至少为24个月。

Several studies show that maintaining and installing equipment to capture the emissions pays for itself within 24 months.

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私有的水处理设备的价格在市场可承受的范围内，维护保养这些设备以及环境保护的投入都尽可能的减少。

Privately owned water utilities will charge what the market can bear, and spend as little as they can get away with on maintenance and environmental protection.

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正确的维护保养可预防剥落。

Proper maintenance can prevent spalling.

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