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16：9的15.6英寸和17.3英寸屏幕长宽各是多少? - 知乎
16:9是长宽比，设长x宽y 15.6英寸指的是屏幕对角线长度，1英寸≈2.54厘米， 15.6英寸≈39.6cm ， 17.3英寸≈43.9cm ， 或者直接拿尺子量实物，印证下是不是这么回事。这个15.6英寸是实际屏幕的尺寸，就是亮屏的尺寸，不包含屏幕外边框。
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macOS Sequoia 15 有必要更新吗？ - 知乎
现在的macOS Sequoia 15.4可以更新。 一、给intel芯片的MacBook参考 手头有一台MacBook Air 2020（intel i3 + 8G +256G），末代Intel中的丐版，在还能升级macOS 15.4的设备里面是垫底的配置。 之前从macOS 10.15，11，12，13，14一路用过来，后面因为忍受不了macOS Sonoma 14的发热卡顿，降级到macOS Catalina 10.15.7，流畅是流畅了 ...
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Griffin 2-Stage adjustable triggers > New AR Products > AR15.COM
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Active Safety Designs ARC-Fire - AR15.COM
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zhihu.com
https://www.zhihu.com/tardis/bd/art/360613407
20种事故类别、15大类伤害方式 (工伤事故伤害方式)、4大类物的不安全状态、13大类：人的不安全行为、6大类危险有害因素
15大类伤害方式 (工伤事故伤害方式) ... 4大类物的不安全状态 依据《企业职工伤亡事故分类》（GB 6441-1986）将“物的不安全状态”分为以下四类： 6.01防护、保险、信号等装置缺乏或有缺陷 6.01.1无防护 无防护罩 无安全保险装置 无报警装置 无安全标志 无护栏或 ...