油和固体燃料加热技工安装和维护住宅及商业楼宇的石油，煤炭和木材取暖系统。
Oil and solid fuel heating mechanics install and maintain oil, coal and wood heating systems in residential and commercial buildings.
油和固体燃料加热技工安装和维护住宅及商业楼宇的石油，煤炭和木材取暖系统。
Oil and solid fuel heating mechanics install and maintain oil, coal and wood heating systems in residential and commercial buildings.
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