| 摘要 |
An apparatus facilitates the support and positioning of an engine block for the purpose of boring the cylinders thereof and the support and positioning of the boring machine used simplifies the operation and permits it to be performed with greater ease, safety and precision. A novel method of suspension of the boring machine over the engine block simplifies the raising and lowering of the machine by levelling it and automatically effecting the proper alignment to insure the accuracy of the boring operation.
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