支钉 meaning in Chinese

support pin

Ok ? there is a pin inside my head
没事？多了一支钉在头顶会没事？
As for the glaze coating , the foot bottom is coated with body - protecting glaze , fired with the stand , which is a feature shared by all these five kinds of famous porcelains and also one of the marks to identify the imperial porcelains
在施釉方面还表现在足底施满护胎釉，支钉烧成，这是五大历史名瓷共同的特征，是御用官瓷精细的标志之一。