Using a right-hand hob with the lead angle ω cuts a left-hand gear with the helix angle β , hob swivel-setting angle δ is:
A: ω
B: β
C: β-ω
D: β+ω
A: ω
B: β
C: β-ω
D: β+ω
举一反三
- The control law of a steering gear is β= - K1φ , where β is steering angle, φ is yaw angle, then it is ( ). A: P type steering gear B: PI type steering gear C: PD type steering gear D: PID type steering gear
- Which structure is not secondary structure of the protein？（） A: α-helix B: β- fold C: β- Angle D: subunits
- 词汇与结构 These problems may cause limited ________ (bank angle/turns), limited or no flap setting, limited bank angle and so on.
- Cardiocentesis<br/>is operated from () A: left<br/>xiphocostal angle B: right<br/>xiphocostal angle C: left<br/>border of sternum D: lateral border of sterm, 4th or 5th<br/>intercostal space E: midclavian line, 2nd intercostal space
- What is the angle of repose? A: The angle of an inclined rock layer measured from a horizontal line B: The angle of the slip plane from a slide C: The angle of plunge into the interior D: The steepest angle at which a material remains at rest