The variable speed systems now used in crank presses have problems such as narrow in variable speed, fault in low speed and failure in tiny adjustment and so on.
目前曲柄压力机调速系统存在调速范围窄、低速故障、微调死机等问题。
Gigantic presses powered by steam (and later, electric power) could crank out books and newspapers and advertisements that strained the always-fickle paper supply.
巨型蒸汽(随后的电力)印刷机大批量地生产出书籍、报刊和广告，供应趋于稳定。
The utility model relates to the structural improvement of the crankshaft of brick presses and particularly to that at the crank of crankshaft.
本实用新型涉及一种压砖机曲轴的结构改进，尤其是曲轴的曲柄 处的结构改进。
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