正确答案: B
2560mm
题目:某螺旋桨半径为2m,在其中一桨叶上0.3R、0.6R、0.9R处各旋转36°时分别测得量杆的升程为256mm、252mm、260mm,请问其0.3R处的局部螺距为()。
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学习资料的答案和解析:
[单选题]中间轴常见的失效形式有()。
A.磨损
[单选题]Among the rings of a piston the () one is subjected to the greatest load and temperature.
top
[单选题]Emulsion oils and sodium nitrite are both approved additives, but () cannot be used if any pipes are galvanized or if soldered joints exist.
the latter