关键词 : 耕地地力 ; 评价体系 ; 木桶原理 [gap=1269]Key words: cultivated land fertility; evaluation system; barrel principle
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Based on the principle of new barrel theory, this paper probed into the digital library, strengthen the network security protection measures.
文章根据新木桶理论的原理,探讨了加强数字图书馆网络安全防护的措施。
The working principle and energy conservation of pin, screw and temperature control equipment in pin barrel cold feed extruder were described.
介绍了销钉机筒冷喂料挤出机中销钉、螺杆及其新型温控装置的工作原理,论述了上述元件节能的理论依据。
This paper introduces the principle of double barrel drum mix plant and the application in producing the asphalt mixture, aiming at the rounding town project of Foshan.
阐述了双滚筒连续式拌和楼的工作原理,并以佛山一环城际快速路为工程依托,介绍其在沥青混合料生产中的应用。
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