包括由塑料制成的前壳体、后壳体和箍儿，箍儿可 套在前壳体和后壳体形成的开口处外侧，其上端形成有稍为收缩 的开口。
The hoop can be sleeved at the outer side of the opening formed at the front casing and the back casing, with a top end forming a slightly contracting opening.
如果排气系统处于真空下，必须在打开排气阀后，逐渐引蒸汽来加热壳体。
If the exhaust system is under a vacuum, the casing must be warmed by gradually introducing the steam, after opening the exhaust valve.
实验结果表明：施加电场后的电流变液夹层圆柱壳体对处于中、高频率的声波没有明显的吸收和阻隔效果，但对于由声激励引起的结构振动有明显的控制作用。
The test results show that by adjusting applied electrical field strength, the properties of the ER material as well as the sandwich cylindrical shell can be changed.
应用推荐