In this article, we have also designed and made a drive circuit for LED and LD which is being used in optical communicating system or optical sensor system as broadband light-source.

在本论文中，我们为了实际的需要，还设计了LED和LD的驱动电路，并制作了这两组电路。我们将把它用作光纤传感系统中的宽带光源。

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Core of large roller cold upsetting die made of ld steel has more ideal hardness, strength, anti wear capacity and impact toughness.

采用LD钢制造大型滚子冷镦模具的模芯，具有较理想的硬度、强度、耐磨性和冲击韧性。

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LF1 series LD laser rangefinder (LRF) have been made, the LRF is a mini, low cost, eye safe, no cooperation target.

研制成一种小型、便携式、低值、对人眼安全、无合作目标的LF 1系列半导体ld激光测距仪。

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