DB21 T 3996.1-2024 农田主要杂草防控技术规程 第 1 部分：总则.pdf

相关资源

DB62 T 689-2000 临夏牡丹栽培技术规程.pdf

DB62 T 820-2002 定西地区无公害农产品 专用型马铃薯生产技术规程.pdf

DB62 T 836-2002 兰州市无公害蔬菜生产技术规程 番茄.pdf

DB62 T 837-2002 兰州市无公害蔬菜生产技术规程 辣椒.pdf

DB62 T 838-2002 兰州市无公害蔬菜生产技术规程 黄瓜.pdf

DB62 T 637-1999 桑蚕纸板方格簇上簇技术规程.pdf

DB62 T 638-1999 桑蚕丝茧育防病消毒技术规程.pdf

DB62 T 996-2003 白银市A及绿色食品生产技术规程 双孢菇.pdf

JT T 1037-2016 公路桥梁结构安全监测系统技术规程.pdf

LY T 1328-2015 油茶栽培技术规程.pdf

猜你喜欢

NASA NACA-RM-A52K14-1953 Experimental investigation of the aerodynamic characteristics of an air-to-air missile employing cruciform wings and tail of rectangular plan form at Mach .pdf

NASA NACA-RM-A52K20-1953 Pressure distribution at Mach numbers up to 0 90 on a cambered and twisted wing having 40 degrees of sweepback and an aspect ratio of 10 including the effe.pdf

NASA NACA-RM-A52L15-1953 Tests in the Ames 40- by 80-foot wind tunnel of an airplane configuration with an aspect ratio 3 triangular wing and an all-movable horizontal tail - longi.pdf

NASA NACA-RM-A52L16-1953 Tests in the Ames 40- by 80-foot wind tunnel of two airplane models having aspect ratio 2 trapezoidal wings of taper ratios 0 33 and 0 20《带有展弦比为2 锥形比为0 33和.pdf

NASA NACA-RM-A53A30-1953 Lift drag and pitching moment of low-aspect-ratio wings at subsonic and supersonic speeds《在亚音速和超音速下 低展弦比的机翼升力 阻力和俯仰力矩》.pdf

NASA NACA-RM-A53B06-1953 An investigation of a four-blade single-rotation propeller in combination with an NACA 1-series D-type cowling at Mach numbers up to 0 83《在马赫数达到0 83时 四叶单循环.pdf

NASA NACA-RM-A53C19-1953 Experimental investigation of the effects of plan-form taper on the aerodynamic characteristics of symmetrical unswept wings of varying aspect ratio《飞机形式锥形.pdf

NASA NACA-RM-A53C20-1953 Subsonic static longitudinal stability and control characteristics of a wing-body combination having a pointed wing of aspect ratio 2 with constant-percent.pdf

NASA NACA-RM-A53H17-1953 Comparison of theoretical and experimental zero-lift drag-rise characteristics of wing-body-tail combinations near the speed of sound《在声速附近 翼身尾翼组合理论和实验零升力阻.pdf