initial deflection of derrick吊杆: boom; hanger rod; sag tie; s ...初: at the beginning of; in the ...挠度: deflection; bending; bend; u ...初挠度: initial deflection挠度: deflection; bending; bend; under load下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:吊杆初挠度,即可在微信中查询翻译