查询词典 fetch back

pay back：偿还(借款等);回报

pat sb. on the back 对某人表示赞许 . | pay back 偿还(借款等);回报 . | pay for 偿还;受到惩罚 .

back field play：后排队员

后排位置 back court position | 后排队员 back field play | 标志杆 antenna

back pressure return：余压回水

back pressure of steam trap凝结水背压力 | back pressure return余压回水 | background noise背景噪声

Back pressure valve：止回阀

backlash valve 无游隙阀门 | back-pressure valve 止回阀 | back-up valve 列车后端制动阀

back projection：背面放映合成

back lot 露天片厂 | back projection 背面放映合成 | background music 背景音乐

BP Back Projection：反投影

Boeing 波音公司(美国) | BP Back Projection 反投影 | BP Back Propagation 反向传播

back room：端线外空地

back boundary line 端线(单打后发球线) | back room 端线外空地 | backhand smash 反拍扣球

back room;runback：端线外的空地

151.端线:base line; back boundary line | 152.端线外的空地:back room;runback | 153.发球区:service court

back sb up：支持某人

bachelorn.单身汉;学士 | back sb up 支持某人 | back down 放弃要求

back seat：上密封

三通式 Three way type | 上密封 Back seat | 上密封试验 Back seal test

the bird of wonder：凤凰;长生鸟

the bird of peace鸽子 | the bird of prey 猛禽 | the bird of wonder凤凰;长生鸟

flange rail：平底轨条

"凸缘皮带轮","flange pulley" | "平底轨条","flange rail" | "凸缘肋","flange rib"