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。
DENTAL PORTABLE MOBILE X-RAY MACHINE SYSTEM DIGITAL
DENTAL PORTABLE MOBILE X – RAY MACHINE SYSTEM w/DIGITAL
DENTAL MOBILE HIGH FREQUENCY X-RAY MACHINE SYSTEM
DENTAL MOBILE HIGH FREQUENCY X-RAY MACHINE SYSTEM
DENTAL PORTABLE MOBILE X – RAY MACHINE SYSTEM w/DIGITAL
Dental Portable Mobile X – RAY Machine System Digital
DENTAL PORTABLE MOBILE X-RAY MACHINE SYSTEM w/DIGITAL
