But manufacturers are building bigger and bigger machines with speed regulators that are easily removed.
但是制造商正在建造更大的、带有速度调整器、容易摘档的发动机。
Installation of these machines will speed up production fifty per cent.
装备这些机器可以使生产速度加快百分之五十。
Stone upper by machines directly into high speed rotating turntable;
石料由机器上部直接落入高速旋转的转盘；
Stone upper by machines directly into high speed rotating turntable;
石料由机器上部直接落入高速旋转的转盘；
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