PVCs are irregular contractions that start off while in the ventricles in lieu of the atria. The contractions ordinarily conquer sooner than the following anticipated heartbeat.
دستگاه‌های ژلیفیکاسیون: معمولاً از نوع ماشین‌های تهیهٔ ورقه هستند.
Occasional premature ventricular contractions in people devoid of heart disease ordinarily aren't a priority and sure You should not need to have treatment. You would possibly need cure When the premature ventricular contractions are certainly frequent or bothersome, or Should you have an underlying coronary heart problem.
مشکلات بهداشتی پلاستیک و ترکیب پلی‌هالوژنه (پی‌اچ‌سی)
در سال‌های اخیر پی‌وی‌سی جایگزین مواد ساختمان‌سازی سنتی نظیر چوب، سیمان و سفال در بسیاری از مناطق شده‌است. با وجود ظهور یک مادهٔ ایدئال در ساختمان‌سازی همچنان نگرانی در رابطه با هزینهٔ پی‌وی‌سی برای محیط زیست طبیعی و سلامتی انسان وجود دارد.
The molecular composition of PVC contains a protracted-chain polymer with repeating vinyl chloride units. Every vinyl chloride unit consists of 1 carbon atom double-bonded to a chlorine atom and one-bonded to 2 hydrogen atoms.
Although you will find certain programs, we would not endorse an expanded PVC sheet, it remains to be significantly stronger plus much more strong than other very similar plastic items. For instance, it will eventually give many years of use when mounted as an upholstery base or possibly a seat back panel.
با وجود این‌که محصولات پی‌وی‌سی تولید شده‌اند یکی از بیشترین مواد سمی شیمیایی به نام دی‌اکسین را منتشر می‌کنند. محصولات پی‌وی‌سی زمانی‌که می‌سوزند یا دفن می‌شوند می‌توانند مضرانه نفوذ کنند.
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Co-stabilisatorer Synergistiska med andra stabilisatorer och kan vara polyoler, organiska fosfiter, epoxiestrar eller epoxiderade oljor
Certainly. An expanded PVC sheet has become developed with inside and exterior employs in mind. You may as a result use it with self confidence on exterior components of one's boat Which might be exposed to rain, snow, sleet, and various adverse weather conditions. Can expanded maritime PVC board be bent to condition?(display/disguise)
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モノマーである塩化ビニル（クロロエチレン）を、繰り返し結合したものをポリ塩化ビニルと呼びます。
Identified inside the 19th century, this sturdy content has located apps in a very wide spectrum of industries resulting from its flexibility, chemical steadiness, and financial performance.