Description
微分时间D的影响:微分作用的强弱主要看微分时问的大小。D越大,微分作用越强,这和积分时间刚好相反。微分作用越强,调节作用越强,其结果使振荡越来越剧烈,周期也越来越短。
AMD Athlon II X2 Desktop System BLUE RAY~TV Tuner Card!
DENTAL PORTABLE MOBILE X-RAY MACHINE SYSTEM DIGITAL P
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X-Ray IMAGE INTERPRETATION SYSTEM -Bausch-Lomb Scope
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DENTAL PORTABLE MOBILE X-RAY MACHINE SYSTEM w/DIGITAL
DENTAL PORTABLE MOBILE X – RAY MACHINE SYSTEM w/DIGITAL
DENTAL PORTABLE MOBILE X – RAY MACHINE SYSTEM w/DIGITAL
AMD Athlon II X2 Desktop System BLUE-RAY!