| 摘要 |
A transmission housing for a hammer drill is formed from a right clamshell half and a left clamshell half formed from injection moulded high-grade strong plastics material. The clamshell halves each have a plurality of threaded holes respectively adapted to receive screws such that the clamshell halves can be joined together to form the transmission housing which encapsulates a transmission mechanism of the hammer drill.
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