各公司正尝试将各种存储技术，从压缩空气泵入洞穴到利用新型超级电容器，投入商业化应用。
Companies are trying to commercialize all kinds of storage technologies, from pumping compressed air into caverns to using new kinds of ultracapacitors.
但该装置所使用的压缩空气不是来自空气泵而是由一液压缸产生。
In this device the compressed-air does not come from pneumatic-pump but is produced by a hydraulic cylinder.
但该装置所使用的压缩空气不是来自空气泵而是由一液压缸产生。
In this device the compressed-air does not come from pneumatic-pump but is produced by a hydraulic cylinder.
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