为了使安装容易些，可以将所有法兰螺栓穿过阀门法兰，然后穿过套管法兰，但是不要让螺栓超过法兰橡胶表面(参阅图4)。
For ease of installation, insert all flange bolts through the valve flange and then through the sleeve flange, but do not let the bolts extend beyond the surface of the flange rubber (See Figure 4).
介绍了一种自行研制的套管表面形貌检测仪的结构、工作原理。
A new type surface testing machine of casing was designed and manufactured, its structure and working principle were introduced.
前半沟套管已在其内部通道表面，以适应中等6毫米螺栓。
The top half of the bushing has groove on its inside channel surface to accommodate the middle 6mm bolt.
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