问题:球化剂的粒度按工艺要求为()mm.A、5—15B、10—25C、20—35D、5—30...
Sunday, August 13, 2023
Sunday, March 24, 2024
Monday, September 12, 2022
Monday, September 12, 2022
Monday, March 20, 2023
问题:ISO—2531标准K9T型DN500离心球墨铸铁管,标准重量()kg。...
Sunday, February 5, 2023
Wednesday, July 5, 2023
Friday, September 30, 2022
问题:DN200球化管的出铁温度为()。A、1480~1500℃B、1490~1510℃C、1510~1530℃D、1530℃以上...
Sunday, August 13, 2023
问题:浇注过程中铁水经扇形包、斜流槽、()流入管摸中。...
Monday, September 12, 2022
问题:球铁管承插口密封工作面不得有连续的()沟纹。A、轴向B、径向C、任意方向D、以上都对...
Wednesday, July 26, 2023
问题:DN200管模在磨光机上磨光时要()端靠近磨光头。...
Sunday, February 5, 2023
问题:屈服强度用符号()表示。A、σbB、σ0.2C、σsD、σe...
Saturday, April 27, 2024
问题:管模与()共同形成铸管的承口型腔。A、芯架B、砂芯C、适配器D、流槽...
Sunday, August 13, 2023
Wednesday, July 26, 2023
问题:砂芯使用的涂料为()石墨涂料,要求具有良好的悬浮性。...
Friday, September 30, 2022
问题:执行ISO-2531标准T型K9系列离心球墨铸铁DN700管重()kg。...
Wednesday, February 1, 2023
Thursday, October 19, 2023
Monday, September 12, 2022
Monday, September 12, 2022