Cad eile is féidir a thabhairt ar na seamanna dall ceann obláta dúnta?

Is féidir glaoch freisin ar rivets dall ceann oblate dúnta:

Seamanna dall ceann cruinn cothrom dúnta, seamanna tarraingthe ceann cruinn cothrom dúnta, seamanna tarraingthe ceann cruinn cothrom dúnta, seamanna tarraingthe ceann cruinn cothrom dúnta.

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