main-boom 主帆桁
Main Boom m 主臂
main boom down 落下主臂
Main boom assembly 主臂总成
main boom extension 主臂延伸臂
main spanker boom 主桅斜桁帆驶帆杆
boom main control valve 动臂主控制阀
boom main control valve schematic 动臂主控制阀简图
main spar boom 主梁缘条
The influence of load hoisting acceleration on dynamic forces is obvious, especially on dynamic bending moment of the main boom.
结论吊重起升加速度对起重机动载荷的影响较大,特别对主臂内的动弯矩的激励更加明显。
Europeans, with their confidence returning, went forth, multiplied and buried many a hatchet. Rising fertility and Europe's integration became the main motors of the continent's economic boom.
重新找回自信的欧洲人又迈开步子、不断向前,与美国重修旧好。增长的人口和欧洲一体化成了这块大陆经济繁荣的主要动力。
Rising fertility and Europe's integration became the main motors of the continent's economic boom.
增长的人口和欧洲一体化成了这块大陆经济繁荣的主要动力。
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