A .793KN
B .7930KPa
C .793Pa
D .793MPa
[单选题]钢级为X95的27/8IF钻杆,本体环形截面积为2000mm2,其抗拉强度为700MPa,则本体抗拉力为()。A .950KNB .1400NC .3500KND .1400KN
[单选题]钢级为S135的27/8IF钻杆,本体环形横截面积为1810mm2,其抗拉强度为800MPa,则本体抗拉力为()。A .135KNB .14480KNC .1448ND .1448KN
[单选题]钢级为S135的27/8IF钻杆,本体环形横截面积为2000mm2,其抗拉强度为800MPa,则本体抗拉力为()。A .135KNB .2500NC .1600KND .400KN
[单选题]钢级为X95的27/8IF钻杆,本体环形横截面积为2000mm2,其抗拉强度为700MPa,则本体抗拉力为()。A .950KNB .1400NC .3500KND .1400KN
[单选题]磨鞋本体的抗拉强度不低于()A .73.5MPaB .735MPaC .7350PaD .735KPa
[单选题]钻挺的抗拉强度不低于()。A .930KNB .930KPaC .930PaD .758MPa
[单选题]钻铤的抗拉强度不低于()。A .930kNB .930kPaC .930PaD .758MPa
[填空题] 压力表精度,低压不低于()级,中、高压不低于()级、
[单选题]合格铜止水片抗拉强度应不低于()。A . 200MPaB . 220MPaC . 240MPaD . 260MPa
[单选题]结422焊条的抗拉强度不低于()兆帕。A . 422B . 411.8C . 400