... galvanized elbow，渡锌弯头 grout cap，灌浆帽 grout cell，出浆盒 ...
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grout cap
灌浆帽
以上为机器翻译结果，长、整句建议使用 人工翻译 。
They cap the igloo by dropping a keystone, or block with edges cut wider above than below, into the remaining gap in the roof, and "grout" the gaps between blocks of snow with additional snow.
人们用拱顶石来盖顶，或者把雪块削切得上边缘比下边缘更宽，放进剩下的屋顶缺口里，再用雪来塞满雪块间的缝隙。
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