The Troubleshooter

摘要

This month I found an envelope,not a big box,on my desk and the small size made me wonder what I would find inside.It turned out to be the basis for another great story.I could tell from the part's 45° angle that it was a small comer piece for a picture frame or window.From the sprue and short runner,I could tell it was a single-cavity mold running in a smaller-sized molding machine.