The first use of urban tunnel with upper vents is HongXing road tunnel in ChengDu.
成都市红星路下穿市政隧道首次采用了顶部开孔的自然通风方式。
Study on Natural Ventilation of Urban Tunnel with Upper Vents;
市政公路隧道顶部开孔自然通风研究
Investigation of Nature Ventilation in Subway Tunnel with upper Vents
顶部开孔地铁区间隧道自然通风计算研究
Remove the top of the drum and cut a small opening on one side at the bottom.
取下容器顶部，并在底部一侧开一个小孔。
after insuring that both front and rear oven doors are sealed, coal is charged into the Oven through three or four top holes.
保证前、后炉门都密封好后，煤从碳化室顶部的3个或4个开孔装入。
a shaker with a perforated top for sprinkling salt.
撒盐的顶部有穿孔的混合器。
a shaker with a perforated top for sprinkling ground pepper.
用来洒胡椒粉的顶部有穿孔的混合器。
You run the thread in through this little hole in the top.
你把线从顶部的这个小孔中穿过来。
Cut Straps First and Remove Top
先切断封带，再打开顶部
A container with small holes in the top for sprinkling ground pepper.
胡椒瓶一种顶部有很多倒胡椒粉小孔的容器
He had noticed, at the top of the Pyramid of the Inscriptions, a stone slab with holes in it.
他注意到在铭文金字塔顶部有一块带孔的石板。
A hole with the top part enlarged so that the head of a screw or bolt will lie flush with or below the surface.
埋头孔顶部扩大的孔，为使钻或螺栓的头与地面相平或在地面以下
a small round container that is open at the top for holding tobacco.
顶部开口的放烟的小的园的容器。
The best way to open an envelope is to slit it at the top.
拆信的最好方法是在顶部拆开。
an open-topped and roughly cylindrical vessel.
顶部开口的粗糙的圆柱状的容器。
round and open at the top for holding liquids.
圆的顶部开口的盛放液体的容器。
round and open at the top for serving foods.
放食物的顶部开口的圆的容器。
fast armored vehicle with four-wheel drive and open top.
有四个轮子和开口顶部的装甲车辆。
Opening a new window just must dismantle on the part of roof.
开一个新窗户就得拆除部分房顶。