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27 天
历史上的今天
正是基于此,与传统LEDSMD贴片式封装和大功率封装相比,板上芯片(COB)集成封装技术将多颗LED芯片直接封装在金属基印刷电路板上,作为一个照明模块通过基板直接散热,不仅能减少支架的制造工艺及其成本,而且还具有减少热阻的散热优势,因此成为照明 ...
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今日热点
Fires immigration judges
Granola bar recall updated
Trump halts school funding
Austria knife attack
Cause of death revealed
DC plane crash: New details
Block on access extended
Chernobyl reactor shell hit
Fisher breaks world record
Sexual assault suit dropped
Abortions to resume in MO
Sentenced for killing wife
US citizen held in Russia
Criticizes European allies
Accepts three-month ban
Trans people enlisting ban
Alabama House passes bill
EU warns on Trump tariffs
Musk's $97.4B bid rejected
Doyle retires from NFL
Uber sues DoorDash
Hamas frees three hostages
Pleads guilty in shooting
US retail sales plunged
$40 million opening day
TX measles outbreak grows
Reach short-term extension
Convoy attacked in Beirut
Misses historic world medal
WY highway tunnel pileup
Lyles, Hill agree to race
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