LD

noun [专属名词]abbr. 检漏器（Leak Detector）；负载(=load) ；当地交付(=Local Delivery)

Free running emerald laser pumped by 660 nm laser diode ( LD ) was reported.
报道了温差水热法生长的祖母绿晶体在660nm激光二极管 ( LD ) 抽运下的激光实验结果.