Because the mold is formed around a one-piecepattern (which does not have to be pulled out from the mold as in a traditional sand casting process), very intricate parts and undercuts can be made.
由于这种铸型是环绕整块型模形成的(无需像传统的砂型铸造工艺那样拔模)，能制作十分复杂的零件和浮雕。
2
The message aggregator pattern addresses the need to take multiple messages from one or more applications and merge them into a single piece of data to be propagated as a new message.
消息聚合器模式处理从一个或多个应用程序获取多个消息并将其合并为单个信息，以作为新消息传播。
3
Turn the paper pattern over, then cut one more of each piece from the same leg. Mark with pencil or tailor's chalk as before.