该装置容易制造，并提供预先计量的单个计量筒，相对容易地使用并可再使用或者任意处置。
The device is easy to manufacture, provides a pre-metered single unit dose, it is relatively easy to use, and can be reusable or disposable.
该装置容易制造，并提供预先计量的单个计量筒，相对容易地使用并可再使用或者任意处置。
The device is easy to manufacture, provides a pre-metered single unit dose, it is relatively easy to use, and can be reusable or disposable.
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