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Japan has deployed a system that fires laser beams with 100 kilowatts of energy — powerful enough to…
A new study finds that bridges in North America and Africa face the highest risk of failure, and res…
Design Optimization of Multi-chamber Hydraulic Cylinder,为了进一步降低液压挖掘机动臂多腔体液压缸驱动系统能耗,并对多腔体液压缸进行轻量化设计,首…