The /etc/rc.d directory structure can be used to put in S and K files at the various run levels listed to bring up or down processes.

可以使用 /etc/rc.d 目录结构在列出的各个运行级别上放入 S 和 K 文件，以启用或停止进程。

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The modifying elements used in hypoeutectic Al Si alloys, besides Na, there are also Sr, Te, Ba, Sb, K, RE, B, S, etc.

亚共晶铝硅合金的变质元素除钠以外，还有锶、碲、钡、锑、钾、稀土、硼、硫等。其中，应用较多的是含钠和锶的变质剂。

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K type reciprocating feeder is made up of frame, floor (feeding trough) transmission platform, funnel gate, rollers, etc.

K型往复式给料机是由机架、底板(给料槽)传动平台、漏斗闸门、托辊等组成。

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Make the best use of funding tax-deferred and tax-free savings accounts, such as a Roth IRA, 401(K) plan, or 529 plans for college savings, etc.

FORBES: Facing the Tax Mountain