This arrangement makes it possible to bubble the exhaust gas down through the outer compartment and then bubble it back up through the opaque middle.
这种安排使得它可以导引废气穿过外隔层，然后再导引其经由中间的不透明管道返回。
The positioning apparatus also includes a piston arranged within said outer cylinder such that the piston and the outer cylinder define a fluid compartment within the outer cylinder.
所述定位装置还包括布置在所述外气缸中的活塞，所述活塞和所述外气缸限定出位于所述外气缸中的流体腔。
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