A→R是一级不可逆反应在dp=2×10^-3 m、l=0.5 J/(s·m·oC)的球形催化剂上进行。气相中A的浓度为1 mol/ m^3,A在颗粒内的De=1.5×10^-5 m^2/s,外部传热系数h=40 J/(s·m^2•oC),反应热(-ΔHr)=5×10^4 J/mol。实测的-rA=30 mol/(m^3·s)。下列计算结果正确的是<br/>
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This invention relates to an ultrasonic curing system. It relates to focusing ultrasonic (HIFU) curing equipment guided by using image aiming and amalgamation method. The system includes central controlling device, ultrasonic energy apply equipment, movement and positioning device of the ultrasonic energy...
1.一种结核病人病床用清扫吸尘器具,其特征是:腰带(12)上固定有带挂钩孔(13)的定位板(15),挂钩(14)与套环(11)固定连接,挂钩(14)挂在挂钩孔(13)上,套有套环(11)的吸尘总管(9)的一端与吸尘器(10)插接相通,其另一端与插头管(8)固定连接相通;接吸尘器负压管接头(4)的一端与插头管(8)插接相通,吸尘开关...