open-ended tunnel 中文意思是什麼
open-ended tunnel
解釋
直流式風洞-
Only four positions were found possible without " mechanical assistance ". the other six needed a special elastic belt and inflatable tunnel, like an open - ended sleeping bag
只有四個姿勢被發現在不藉助「輔助器械」下可能實現。另外六個需要藉助特殊的彈性帶和同一端開口的睡袋一樣的可膨脹的管道。
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