在轧制生产过程中,计算机主要通过仪器仪表来采集现场数据。
A. 正确
B. 错误
加油机体积示值的最大允许误差和测量的重复性误差分别不超过()。
A. ±0.3%和0.25%
B. ±0.3%和0.15%
C. ±0.5%和0.15%
D. ±0.3%和0.3%
A sufficient amount of chain must be veered when anchoring a vessel to ensure().
A. the vessel has enough room to swing while at anchor
B. the anchor flukes bite into the ocean bottom
C. there is sufficient weight from the anchor and chain to prevent dragging
D. there is more chain out than there is in the chain locker
研究表明:振痕处容易形成裂纹和成份偏析,且随着振痕的深度加深而加重,因此减少振痕深度是改善铸坯质量的重要措施。
A. 正确
B. 错误