Selection duration 选择时长
Selection of laser pulse shape pulse duration flux density are discussed in pulsed laser microwelding and the experimental results are given.
讨论了脉冲激光微型焊接中，对于激光的脉冲形状、光脉冲宽度、光通量密度等的选择，并给出了实验结果。
The motion design of follower includes selection of motion law and distribution of motion duration for each motion phase.
从动件的运动设计包括各运动阶段运动规律的选择和运动时间的分配。
The author emphasizes that the therapeutical effect depends on the duration of the disease, the clinical course, the skill of the operator, and the appropriate selection of indication.
强调疗效的好与差，主要取决于患病时间的长短、临床病程及手术技巧和手术适应症的选择是否恰当。
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