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talk back hailer：一种驾驶台与船舶各部联系的传声设备

talk back facilities 对讲设备 | talk back hailer 一种驾驶台与船舶各部联系的传声设备 | talk back telephone 对讲电话

half back：念寮

centre half back 嶄寮 | half back 念寮 | left half back 恣念寮

remain back; hang back：逗位

殿卫 fullback | 逗位 remain back; hang back | 端线区 end zone

have one's back to the wall：被逼到没有退路; 陷入绝境; 以寡敌众; 负隅死战

have...on one's back 背着, 驮着 受...攻击; 受...的责难; 被.... | have one's back to the wall 被逼到没有退路; 陷入绝境; 以寡敌众; 负隅死战 | fight with one's back to the wall 被逼到没有退路; 陷入绝境; 以...

have one's back to the wall：负隅顽抗

have sb. at one's back有某人在背后支持, 有某人撑腰; | have one's back to the wall负隅顽抗 | go behind sb.'s back在背后搞鬼,

To have one's back to the wall：努力克服巨大困难

To do something behind someone's back:背着干欺骗勾当 | To have one's back to the wall:努力克服巨大困难 | To see the back of someone/something:摆脱恼人的人或事

have/with one's back to/against the wall: to be in the most possible difficulties：处于困境

turn my back on: 置之不理 | have/with one's back to/against the wall: to be in the most possible difficulties 处于困境 | put someone's back up: to annoy someone 是某人生气

have...on one's back：背着, 驮着 受...攻击; 受...的责难; 被...不断地挑毛病

go behind sb.'s back 在某人背后搞鬼, 背着某人搞小动... | have...on one's back 背着, 驮着 受...攻击; 受...的责难; 被...不断地挑毛病 | have one's back to the wall 被逼到没有退路; 陷入绝境; 以寡敌众; 负隅...

back hoe：反向铲

back grey 印花衬布 | back hoe 反向铲 | back light 后灯

back hoe：反向铲土机

back heating 逆加熱 | back hoe 反向铲土机 | back hole 顶板炮眼

Hilt's law：希尔特煤品级定律

"hillside quarry","山坡石矿" | "Hilt's law","希尔特煤品级定律" | "hindered settling","阻流沈降"

Shaanxi Sunland Automatic Control Co.,Ltd：陕西神洲自动控制有限公司

SHAANXI QINCHUAN MACHINERY DEVELOPMENT CO.,LTD 陕西秦川机械发展股份有限公司 | Shaanxi Sunland Automatic Control Co.,Ltd 陕西神洲自动控制有限公司 | Shan Dong Shuang Yi Group Co.,Ltd 山东双一集团有限公...