qiān dūn
意思解释：（Kiloton）一千吨。 同“千吨当量”
指1964年我国江南造船厂制成的一万二千吨巨型水压机。是参加这项工程研制的科学技术人员和全体工人自力更生发展现代化工业所取得的重大成果，是目前我国最大的一台锻压设备。主机有六七层楼高，基础深入地下40米，能把两三百…
12 thousand tons when show dockyard of our country Changjiang Delta was made 1964 giant water press. It is the technology staff that joins this project development and collectivity worker the significant gain that self-made development modernization is versed in place of course of study is obtained, it is installation of our country's at present biggest a v. Lead plane has 67 buildings tall, fundamental development underground 40 meters, can two 300...
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