查询词典 double-barreled

double span trussed roof structure：双跨屋架结构

double source ==> 双源 | double span trussed roof structure ==> 双跨屋架结构 | double span wire system ==> 双拉线式

double-face sluice valve：双面闸阀

double-evaporation boiler 两极蒸发锅炉 | double-face sluice valve 双面闸阀 | double-faced box slide valve 双面滑阀

Double Slip Switch：双交叉转辙器

Double Crossover 交叉横越线 | Double Slip Switch 双交叉转辙器 | Double Track 双轨

Double Slip Switch：双交叉转辙器(铁路)

双滑件机构 double slider machanism | 双交叉转辙器(铁路) double slip switch | 双火星塞点火 double spark plug ignition

Double Slip Switch：双动转辙器

double-pole switch 双刀开关; 双极开关 | double-slip switch 双动转辙器 | double-throw disconnecting switch 双投隔离开关

Double Slip Switch：复式交叉转辙器

"double-silk-covered wire ","双层丝包线" | "double-slip switch ","复式交叉转辙器" | "double-speed motor ","双速电动机"

double slide-wire potentiometer：双滑线电势计

double slide valve ==> 双滑阀 | double slide-wire potentiometer ==> 双滑线电势计 | double slider coupling ==> 十字头联轴节

double-faced box slide valve：双面滑阀

double-face sluice valve 双面闸阀 | double-faced box slide valve 双面滑阀 | double-faced pallet 双面托盘

double-faced box slide valve：双面滑阀,分配滑阀

两级蒸发锅炉 double-evaporation boiler | 双面滑阀,分配滑阀 double-faced box slide valve | 双面闸阀 double-faced sluice valve

double-track skip hoist：双料斗卷扬机

double-trace scope 双迹示波器 | double-track skip hoist 双料斗卷扬机 | double-transit oscillator 双渡越振荡器

McKenna：麦肯纳(姓氏)

officers n.政府官员, 军官, 警官, 船长vt.指挥 | mckenna 麦肯纳(姓氏) | disappointing adj.使人失望的, 令人失望的

rapid：激流

他们穿过很多美丽的峡谷,绕过无数大瀑布(cataract)、激流(rapid)和瀑布(waterfall). 带着仅有的两艘船,和几乎完全耗尽的给养,剩余的六个人终于到达了维尔京河(Virgin)的摩门教定居点. 这里,是他们一百天探险的终点.