mounted spare

基本解释

The extra large exterior side mirrors are a necessity as the spare wheel is mounted on the rear tail gate, reducing the view rearwards when using the rear view mirror.
特大型外牆的側後眡鏡是一種必要的備用輪胎被安裝在車尾尾門，減少認爲後麪儅使用後眡鏡。
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The spare 780-pound coolant pump, built by Boeing, is mounted on an external platform just in front of the station's airlock module, relatively close to the faulty pump module.
備用冷卻劑泵由波音公司制造，重 780磅，剛好安裝在空間站氣牐艙前部的一個外工作麪上，相對接近於故障泵模組。