sector cement bond tool(sbt) is an acoustic log tool for inspecting quality of the cement bond around the circumference of the casing tubing ans for measuring the pore paths.
扇区水泥胶结测井仪(sbt)是一种检测套管水泥胶结质量及探测孔穴孔道的声波测井仪器。
the article sum simply the developing of pc application in welding, then sum situation of pc application in database, es, controlling and inspecting quality of welding.