问题:国内最早开展焊接工艺评定最早的焊接产品是(),并且相继制定了有关...
Sunday, September 11, 2022
问题:影响切削力的主要因素有工件材料、刀具角度、切削用量和()条件。...
Wednesday, April 3, 2024
Monday, September 12, 2022
Sunday, September 11, 2022
Monday, September 12, 2022
Friday, June 16, 2023
Friday, September 16, 2022
Sunday, September 11, 2022
问题:除鳞箱是通过()、上盖和侧面挡板与机架形成封闭的箱体,来阻止水汽...
Friday, September 16, 2022
Friday, September 16, 2022
Monday, September 12, 2022
问题:对质量控制要求由工艺人员查出一项扣质量分()分。...
Friday, September 16, 2022
问题:使用千斤顶前应按起重工件的()和起升高度选择相应的千斤顶。...
Friday, September 16, 2022
问题:轧件在生产中常可见到前进运动停止而旋转运动继续这是因为一次咬入不...
Friday, September 16, 2022
Sunday, September 11, 2022
问题:轧机的压下装置通常分为手动、电动和液压压下三种类型。...
Friday, September 16, 2022
Friday, September 16, 2022
Sunday, September 11, 2022
问题:电能消耗是生产一吨合格钢材需要的电量,单位产品的电能消耗(度/吨...
Sunday, September 11, 2022
Friday, September 16, 2022