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CONTROL METHOD AND SYSTEM FOR ENSURING STABLE BORING OPERATION AT WORKING FACE DURING TUNNELLING WITH TUNNEL BORING OR SHIELD MACHINE
CONTROL METHOD AND SYSTEM FOR ENSURING STABLE BORING OPERATION AT WORKING FACE DURING TUNNELLING WITH TUNNEL BORING OR SHIELD MACHINE
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机译：在隧道掘进或盾构掘进隧道期间确保工作面稳定掘进操作的控制方法和系统
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摘要
An improved golf club shaft and golf club, the shaft being of stepped configuration, having a uniform outer diameter butt end portion having a uniform wall thickness at least 10 inches (254mm) long, the uniform wall thickness being not greater than 0.012 (0.305mm) and a plurality of cylindrical step portions of progressively smaller outer diameter terminating in a tapered tip end portion having a wall thickness at the tip end of at least 0.024 (0.610)mm). The shaft is characterized by a redistribution of metal which results in a balance point closer toward the tip of the shaft, making it possible to use a lighter head without affecting the swing weight.
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