In practice, the selected interval thickness is usually a compromise between the need for a thin interval to maximize the resolution and a thick interval to minimize the error.
为保证最大分辨率必须选用薄层，为使误差最小却须选用厚层，实际上通常选择介于两者之间的最佳厚度。
According to different construction tools, according to the instructions specified interval and re-painted to ensure quality of coating film thickness.
根据不同施工工具，按说明书规定的重涂间隔及涂膜厚度保证涂装质量。
The wall thickness is determined by measuring the interval time of echoes at the interfaces.
壁厚测量是通过测量界面回波间隔时间来实现的。
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