共晶铝硅合金活塞顶部直径有两次突然长大，而过共晶铝合金活塞仅有一次。
The crown diameter of eutectic al Si alloy piston has increased suddenly in twice, but the hyper eutectic al Si alloy piston only once.
据英国《每日邮报》1日报道，罗马万神庙顶部有一个直径30英尺的大洞，数个世纪以来，这个洞的用途一直让人甚为困扰。 不过。
The huge 30ft hole built into the dome of Rome’s Pantheon has mystified minds for centuries.
巢建云杉，两旁的头发或切碎树皮，外观粗糙，体积大，直径达1.5米（5英尺）可以构造顶部的悬崖或树上。
Nest built by asperata, lined hair or shredded bark, the appearance of rough, bulky, diameter up to 1.5 meters (5 feet) can be constructed on top of a cliff or a tree.
该领域在顶部有一个直径为45米和263米以上的地面。
The sphere at the top has a diameter of 45 meters and is 263 meters above ground.
实际上有些常用的滤碗底部的面积只有顶部面积的60%(译者注：还是直径差60% ？)
In fact, some popular filter baskets have only about 60% area on the bottom for liquid to flow through, as compared to the diameter at the top of the puck.
理论上实现了用较少的天线单元，且与小直径圆柱面共形的阵列，激励产生副瓣电平较低、主瓣有一定的宽度且顶部较平坦的波束。
Theoretically, a column conformal array with small size and few elements to generate a shaped beam with low side lobe and main beam with fixed width and flat top is carried out.
该机的主机体由直径不同的两个圆筒套在一起固定在底板上，顶部加盖板。
The main machine body of the drier and two cylinders with different diameters are sheathed and together fixed on a bottom board. A cover is added on the top part.
该机的主机体由直径不同的两个圆筒套在一起固定在底板上，顶部加盖板。
The main machine body of the drier and two cylinders with different diameters are sheathed and together fixed on a bottom board. A cover is added on the top part.
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