Clearly, the hobbits and wizards of "the Lord of the Rings" are not all that Mr Jackson has up his cinematic sleeve.

显然，《指环王》中的“哈比人”和“巫师”并不能代表杰克逊在电影上的全部创意。

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The valve stem with its grooved rings and positioning sleeve indicates the throttled position of the valve.

阀杆及其沟槽环和定位套筒显示阀门的节流位置。

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They can also be supplied as self-retaining units with a retention sleeve over the outer rings (FIG 10).

它们也可以作为自保持式单元供应，外圈上有保持套筒(图10)。

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