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D_2-40型筒式柴油打桩锤是浦沅工程机械厂和长沙建筑机械研究所共同研制的。经过试验、工业考核于1977年5月通过鉴定并投入批量生产。我国无产阶级文化大革命初期开始生产筒式柴油打桩锤,已制造出的有D_2-1、D_2-6、D_2-12、D_2-18、D_2-25等一系列产品。D_2-40型筒式柴油打桩锤是为了满足日益发展的港口和工业民用建筑的需要而研制的新产品。在D_2-40型打桩锤的研制过程中,坚持“独立自主,自力更生”的方针,吸取了国内外的先进
The D_2-40 drum type diesel pile hammer is jointly developed by Puyi Construction Machinery Factory and Changsha Construction Machinery Research Institute. After the test, industrial assessment in May 1977 passed the identification and put into mass production. China’s proletarian cultural revolution began production of barrel diesel hammers in the early stages of the Great Proletarian Cultural Revolution. D_2-1, D_2-6, D_2-12, D_2-18, and D_2-25 have been manufactured. The D_2-40 drum diesel piling hammer is a new product developed to meet the needs of the growing port and industrial civil buildings. During the development of the D_2-40 piling hammer, it adhered to the principle of “independent, self-reliance, self-reliance” and drew on advanced domestic and foreign