ramp door 登陆舌门 ; 跳板门
Are mixed concrete ramp door 现拌砼大门坡道
RCDC Ramp Cargo Door Controller 停机坪货舱门控制器
Are mixing concrete door ramp 现拌砼大门坡道
The front elevation features a metal ramp leading to the front door and a movable exterior wall that slides open to reveal a wood store.
正面可见一个通向正门的金属斜坡以及一个可移动的外墙，这片外墙可滑动以揭开木制的储物空间。
Do not walk under any pipe resting on the V-door ramp.
不允许在放有钻杆的大门坡道下边通行。
Do not slide down pipe, rotary hose, V-door ramp, or cables. Do not ride with the cat-line or air hoist.
不答应从钻杆、水龙带、大门坡道、电缆、锚头绳或气动绞车绳索上往下滑。
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