Friday, October 6, 2023
Tuesday, September 13, 2022
切削的类型有带状切削、挤裂切削、粒状切削和()切削四种。...
Saturday, December 9, 2023
为了改善碳速工具钢的切削加工性,其预先热处理应采用:()。A、完全退火B、球化退火C、去应力退火...
Saturday, April 27, 2024
在劳动保护规定中,表示“禁止、停止”的安全色是()。A、红色B、兰色C、黄色D、绿色...
Saturday, July 15, 2023
计算题:由两齿轮组成的定轴系传动系统中,齿轮1为主动轮,齿轮2为从动轮,且Z1=60、Z2=90,当齿轮1的转数n1=3时,计算n2为多少?...
Thursday, February 2, 2023
GB/T228-2002规定直径为7-10mm圆形横截面试样平行...
Tuesday, September 13, 2022
Wednesday, January 10, 2024
对数控机床描述错误的是()。A、适应性广B、利用率高C、生产准备时间长...
Saturday, September 2, 2023
Friday, March 15, 2024
Friday, March 15, 2024
Tuesday, January 31, 2023
千分尺的读数精度为()。A、0.1B、0.01C、0.001D、0.0001...
Wednesday, December 13, 2023
车削细长轴时,为了减少切削力和切削热,车削的前角应取为()。A、<15°B、>30°C、15°~30°...
Sunday, November 19, 2023
M7120D型卧轴矩台平面磨床手动最大移动量为:()。...
Tuesday, September 13, 2022
计算题:由两齿轮组成的定轴系传动系统中,齿轮1为主动轮,齿轮2为从动轮,且Z1=60、Z2=90,当齿轮1的转数n1=3时,计算n2为多少?...
Thursday, February 2, 2023
Tuesday, September 13, 2022
常见机床名称代号中“磨床”的代号为:()。A、CB、ZC、MD、B...
Wednesday, January 10, 2024
Saturday, November 11, 2023
直接改变原材料(毛坯)的形状尺寸和材料性能,使之变成品或半成品的过程称为()。...
Sunday, March 5, 2023