همچنین محصولات فرعی وجود دارد که پروفیل‌های اکسترود شده بر پایهٔ پلی‌وینیل کلراید سخت (یو پی‌وی‌سی) با مقاومت ضربهٔ بالا و سطح خارجی سفید هستند و در ساخت در و پنجره‌هایی که در دیوارهٔ خارجی ساختمان به‌کار می‌روند، استفاده می‌گردند.
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Not only does this decrease the Value and degree of non-recyclable products, but In addition, it helps to lessen its excess weight much too. On account of its weather resistance together with other Rewards, it is actually a typical material employed for boat elements.
این صفحه آخرین‌بار در ۲۳ ژانویهٔ ۲۰۲۵ ساعت ۱۵:۳۹ ویرایش شده است.
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ポリ塩化ビニルの「ポリ」という言葉は、ポリマー（重合体）からきたもので、「たくさん」という意味があります。しかし、一般的に呼ばれている「塩ビ」は塩化ビニルではなく、ポリ塩化ビニルを指しているケースが多いので注意が必要です。
PVC features a list of one of a kind Homes that add to its wide selection of applications. Among the list of principal properties is its sturdiness and resistance to environmental stressors such as dampness, chemicals, and ultraviolet radiation.
Premature ventricular contractions generally trigger several or no signs and symptoms. But the additional beats could cause unconventional sensations within the chest, such as:
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Pure polyvinyl chloride is often a white, brittle stable usually sent as powder or pellets. It really is insoluble in Alcoholic beverages but somewhat soluble in tetrahydrofuran.
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In a typical coronary heart rhythm, a tiny cluster of cells with the sinus node sends out an electrical signal. The sign then travels through the atria on the atrioventricular (AV) node and into the ventricles, resulting in them to contract and pump blood.
Upcoming, the alerts arrive at a cluster of cells called the atrioventricular (AV) node, in which they decelerate. This slight hold off allows the ventricles to fill with blood. When the electrical signals reach the ventricles, the chambers agreement and pump blood on the lungs or to the remainder of the system.
Premature ventricular contractions (PVCs) are additional heartbeats that begin in one of the coronary heart's two lower pumping chambers (ventricles). These excess beats disrupt the common pvc شبابيك coronary heart rhythm, often leading to a sensation of the fluttering or maybe a skipped defeat inside the chest.