back-up air tank：備用氣箱

back-up air supply 備用空氣源 | back-up air tank 備用氣箱 | back-up cooling 備用冷卻

put/get sb's back up"=make sb angry：觸怒某人,使之生氣

He put his back into studying for the exam. 他為考試盡全力學(xué)習(xí). | 6."put/get sb's back up"=make sb angry 觸怒某人,使之生氣 | What he did at the party put her back up. 他在舞會(huì)上的所做所為惹惱了她....

back up block：支撐塊

back to back houses 背對(duì)背房屋 | back up block 支撐塊 | back up wall 背墻

Back-up light：倒車燈 Back wall 后圍

Back-up buzzer 倒車報(bào)警器 | Back-up light 倒車燈 Back wall 后圍 | Bad conductor 不良導(dǎo)體

Back-up protection：后備保護(hù)

61 Back-up over-speed governor 附加超速保護(hù)裝置 | 62 Back-up protection 后備保護(hù) | 63 Back-up ssystem 后備繼電保護(hù)

Back-up protection：備用保護(hù)裝置

back up plate 推靠板 | back up protection 備用保護(hù)裝置 | back up store 后備存儲(chǔ)器

back-up area：備用堆置場(chǎng)

back up 墊板,背撐,(鑄造用語(yǔ))填背砂 | back up area 備用堆置場(chǎng) | back up battery 后備電池

back-up safety device：備用安全裝置

back up protection 后備保護(hù) | back up safety device 備用安全裝置 | back up supply 備用電源

back-up safety device：后備安全設(shè)備

后備繼電保護(hù) back-up relaying | 后備安全設(shè)備 back-up safety device | 后備電源 back-up source

back-up safety device：備用安全設(shè)備,備用安全裝置

back-up roll | 支撐軋輥,支撐輥 | back-up safety device | 備用安全設(shè)備,備用安全裝置 | back-up source | 后備電源,備用電源