The easier level of the challenge requires flights of 90 seconds and a landing on a small, flat circular pad.
稍容易的初级挑战级别要求飞行90秒，然后在一个小型圆形平台上降落。
The finite method of EHLwas used to analyze the properties of sector pad and circular pad thrust bearing separately on the condition of centre pivoted.
应用有限元程序分别对圆形瓦和扇形瓦推力轴承在中心支承条件下的性能进行了计算。
Oscar is carefully mounted on the base, and a circular felt pad is placed on the bottom.
奥斯卡被仔细的装到基底上，一块圆形的棉垫被放在底部。
It has a large circular shape, soft vinyl pad design with gripping feet that prevents it from slipping from the patients bed. The product is oxygen safe and available in various colors and lengths.
软垫呈大扁平形，软塑料制作，上有夹子可避免从病人床上掉落，产品具有抗氧性，有多种颜色和长度。
The inner mold support of a knee pipe is composed of the semi-circular arc-shaped support frames and a bivariate arc pad mold.
弯管内模支撑由半圆弧形支撑架与双变弧垫模组成。
The inner mold support of a knee pipe is composed of the semi-circular arc-shaped support frames and a bivariate arc pad mold.
弯管内模支撑由半圆弧形支撑架与双变弧垫模组成。
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