翻转内衬法修复技术的程序中,清管的上一步工作是()。
A. 开挖作业坑
B. 断管
CCTV检查
D. 固化
压力表根据操作压力选用,量程应为操作压力的1.5~3倍,最好选用2倍。
A. 正确
B. 错误
A Fibre Channel fabric (or Fibre Channel switched fabric, FC-SW) is a switched fabric of FibreChannel devices enabled by a Fibre Channel switch. Fabrics are normally subdivided by Fibre Channel zoning. Each fabric has a name server and provides other services. Higher redundancy over FC-AL,P2P.Which path selection protocol is used by Fibre Channel fabrics?()
A. OSPF
B. RIP
C. FSPF
D. VSAN
()是电火花成型加工机床的关键部件。
A. 床身
B. 立柱
C. 主轴头
D. 工作台