The incidence of casting defect is higher in the clasp and minor connecter,mandibular than maxillary.
AMID the ageing brick warehouses of South Boston, an assembler at the Cole Hersee switch plant inserts the pin into a roller connecter, flattening each end with a metal press to keep it secure.
The connecter jack one will clean dust and put it into washing bag and then the dust could be removed with sewage which will not pollute the floor again.
