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。
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.
薄薄的木质板附着在这层透明膜上，便是圆筒的间隔层。
Thin wooden slats are attached to the membrane to form the running surface of the roll.
提供了一种制造光学存储介质的方法，该介质至少包括透明间隔层(22)或者透明复盖层。
A method of manufacturing an optical storage medium is provided, which comprises at least a transparent spacer layer (22) or transparent cover layer.
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