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新型直压式手动原状土取土钻的设计及应用贾书刚，杨学明，王淑平（吉林农业大学土化系，１３０１１８）ＤＩＳＩＧＮＡＮＤＡＰＰＬＩＣＡＴＩＯＮＯＦＡＮＥＷＨＡＮＤ－ＯＰＥＲＡＴＥＤＡＮＤＶＥＲＴＩＣＬＥ－ＰＲＥＳＳＵＲＥＤＵＮＤＩＳＴＵＲＢＥＤＳＯＩＬＳＡ...
Design and application of a new type of straight-pressure manual soil-boring machine Jia Shuangang, Yang Xueming, Wang Shuping (Department of Soil Chemistry, Jilin Agricultural University, 130118) DISIGNANDAPPLICATIONOFANEWHAND-OPERATEDANDVERTICLE-PRESSUREDUNDISTURBEDSOILSA ...