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为推进螺杆制冷技术在我国的进一步发展,促进生产厂的技术进步,宣传推广螺杆式制冷机在工程应用中的成功经验,上海市制冷学会制冷机械与设备专
In order to promote the fu
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道路最曲折的地方是我的故乡,大山最障眼的地方是我的故乡。哦,故乡,你躲在人不知的山旯旮,那里的天空格外蓝,那里的土地格外香。我出生在这里就以你为荣,从这里走出的人才有