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[主观题]
The author of the famous novel Uncle Tom's Cabin is a woman, whose name is Harriet B
eecher Stowe. ()
此题为判断题(对,错)。
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此题为判断题(对,错)。
(1)试说明7306B的意义。
(2)计算轴承Ⅰ,Ⅱ的当量动载荷各是多少?
注:(1)7360B轴承的派生轴向力S=1.14Fr,fp=1;(2)径向系数x和轴向系数y值如下:当Fa/Fr≤1.14时,x=1,y=0;当Fa/Fr>1.14时,x=0.35,y=0.57。