Saturday, September 17, 2022
Sunday, September 18, 2022
Thursday, September 22, 2022
单选题钻杆接头之间,主要是靠什么密封的()A 台肩B 螺纹C 钻杆本体D 丝扣油...
Wednesday, September 13, 2023
在夹具中,对工件上已经精力加工的平面进行定位时,通常用()作定位元件。...
Thursday, September 22, 2022
Wednesday, September 14, 2022
单选题扩孔钻进时,为了减少施工程序,应该()。A 减少扩孔级数、增大扩孔级差B 增多扩孔级数、减少扩孔级差C 增多扩孔级数、增大扩孔级差...
Tuesday, December 26, 2023
单选题深沉搅拌桩施工中应适当提高水泥参入比的部位是()A 最顶部;B 桩顶到下部4米处;C 最低部;D 都不是...
Friday, December 1, 2023
Saturday, September 17, 2022
Wednesday, June 28, 2023
使用无间隙芯轴、圆柱、游标高度尺和平板等检具可检测斜孔的()...
Saturday, September 17, 2022
Friday, April 26, 2024
单选题多刃深孔钻头()处有喷液小孔,钻杆中间有切削液输入孔,可将碎的切屑用高压切削液冲走。A 副切削刃B 横刃C 主切削刃D 圆周面...
Friday, April 26, 2024
单选题标准麻花钻头的后角是在()内度量的。A 主剖面B 园柱剖面C 基面...
Wednesday, June 28, 2023
单选题水泥的标号,是将水泥用标准规定方法制成标准试样,在标准条件下养护后进行抗压、抗折强度实验等中()天的抗压强度数值,即为水泥标号。A 3B 7C 28D 8...
Saturday, January 20, 2024
分度头的蜗轮为40齿,蜗杆为单头,简单分度时手柄与蜗杆每转一周,蜗轮即带动主轴转动()圈。...
Friday, September 16, 2022
双动双管内钻头一般超前于外钻头,岩石愈松软则超前愈多。...
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
用块规与心轴校正主轴位置时,块规与心轴的间隙要用()测定,以免影响校正精度。...
Thursday, September 15, 2022