保温盖的上层留有凹 槽，用于将保温桶放置在上部而不会造成滑动。
The upper cover of the insulation cover is provided with a concave groove for the displacement of the of the insulation bucket at the upper part without causing sliding.
保护壳体具有下部件和帽类型的上部件，所述下部件具有至少一个被合适成形的凹部，以将配料单元保持在稳定位置。
The protective housing has a lower part with at least one suitably shaped cavity for holding the metering unit (s) in a stable position and a cap-type upper part.
第一多晶硅层的上部被除去，以便空隙扩大到凹部，以及凹部被露出。
An upper portion of the first polysilicon layer is removed such that void expands to a recess and the recess is exposed.
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