常見例句雙語(yǔ)例句The box beam was one of the most important stress parts of the crane which required high quality butt weld.箱形梁是集裝箱吊具的重要受力部件，對(duì)焊接質(zhì)量要求高。Based on fracture mechanics and theory of reliability, this paper offers the reliability calculation method for welded box beam having fracture.根據(jù)斷裂力學(xué)及可靠性理論，提出了一種起重機(jī)焊接箱形梁存在裂紋缺陷的可靠度計(jì)算方法。airiti.comSootblowers shall have steel box beam construction to enclose the drive mechanism, motor, lance and other moving or hot parts for complete personnel protection and safety.為了能對(duì)人員完全起到保護(hù)和安全作用，吹灰器應(yīng)有鋼制箱梁結(jié)構(gòu)來(lái)密封驅(qū)動(dòng)機(jī)構(gòu)、電機(jī)、吹灰槍和其它活動(dòng)或較熱部件。www.1x1y.com.cn權(quán)威例句He told me of a box on his route that has a steel I-beam for a post and, riding astride it, a regular mailbox set inside a much bigger metal box, the space between the two filled entirely with concrete.FORBES: Zero Dollar Fix 返回 box beam