Waste water treatment plants and water purification plants are operated by skilled technicians who are certified in this field. Training includes mathematics, chemistry, and biology.
污水处理厂和水质净化厂都是有一定专业资格认证的技术人员所操作的。
Waste water treatment plants and water purification plants are operated by skilled technicians who are certified in this field. Training includes mathematics, chemistry, and biology.
污水处理厂和水质净化厂都是有一定专业资格认证的技术人员所操作的。
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