PVC CPVC rigid plastic pipes similar to PVC drain pipes but with thicker walls to deal with municipal water pressure, introduced around 1970.

PVC should be used only for cold water, or for venting.

The spacing between the PVC and the preceding QRS wave is a lot shorter than usual and the time between the PVC and the proceeding QRS is a lot longer.

Principal types include Polyvinyl chloride (PVC) was produced experimentally in the 19th century but did not become practical to manufacture until 1926, when Waldo Semon of BF Goodrich Co. developed a method to plasticize PVC, making it easier to process.

The plastics are made of PVC in addition to additives such as a plasticizer, often DEHP.

An environmental psychologist told me, If you're sitting in a hard chair on a rigid surface, you'll be more rigid.

A modern Barbie doll has a body made from ABS plastic, while the head is made from soft PVC.

For example, PVC gloves or nitrile rubber gloves , and thickness and breakthrough time of the glove material. Special requirements may exist for respirators.

You mix them together and they make a rigid double helix.

Second, China s financial system is fragile, and its economic structure rigid.

Rigid timetables that history suggests would not be met should be eschewed.

And that means that China also must reconsider its rigid notion of sovereignty.

Rigid rules and distant policymakers merely suffocate the animal spirits of the business class.

More importantly, even the regulators themselves have ceased to believe in obsolete and rigid doctrines.

So the point here is that not all boys exist within these rigid boundaries of what we think of as boys and girls, and not all girls exist within those rigid boundaries of what we think of as girls.

In the American Iranian equation it was the US, not Iran, that conducted rigid ideological diplomacy.

For almost 40 years, that era s Western feminist critique of rigid sex role stereotyping has prevailed.

The problem, however, is that prices have generally proved much more rigid, declining only in Ireland.

But it is more likely that the regime is too rigid and too blinkered to act.

These structures are often rigid, quite bureaucratic, dominating by men, and as such, intimidating for women.

It can be a permanent virtual circuit (PVC), which is created administratively on the end points, or a switched virtual circuit (SVC), which is created as needed by the communicating parties.

To put it simply, a sound management system cannot operate with rigid bureaucratic structures and institutional inflexibilities.

Customary law is not rigid in that it is made to fit round the demands of global economy.

The other school, by contrast, worried that the existing monetary system was rigid, brittle, and prone to crisis.

Moreover, removing rigid protections without offering alternative, contingent safety nets and judicial redress is a recipe for conflict.

The Security Officer will also be responsible for ensuring that all technology meets rigid security standards before deployment.

Indeed, the application of rigid solutions has contributed rather to a further widening of the gap between countries.

With regard to parliament, there is no need to follow Lebanon s rigid apportionment of seats according to confessional identity.

These qualities simply don't exist in Russia's Sovietized military organizations, with their rigid hierarchies and culture of blind conformity.

Saudi Arabia, long one of the Arab world s most rigid societies, now finds itself in a state of flux.

During purely translational motion (motion with no rotation), all points on a rigid body move with the same velocity.

We do not believe that, as some suggest, such a step would hamstring the Council by imposing rigid guidelines.

In this regard, the constant search for consensus should not be hindered by unreasonable pre conditions or rigid positions.

Language, on the other hand, has an intermediate level of entropy it's neither too rigid, nor is it too random.

Rigid, top down uniformity is essential in the specification of weights and measures and the issuance of currency and coin.

High tax rates on labor together with rigid regulation of hiring and firing make employers extremely reluctant to recruit workers.

Such legislation must also have rigid compliance standards that are reviewed and enforced by the state s electoral authorities and courts.

First, rigid rules that wipe out shareholders and penalize long term creditors are a clear deterrent from bankers point of view.

Thus, the attempt to protect workers with rigid labor laws may have the unintended consequence of generating too few protected jobs.

Thus, a sort of free gift exchange between employer and employee emerged from these experiments, not any rigid or formulaic employment contract.

The stability of the international financial system today depends on the willingness of countries with rigid exchange rates to allow greater flexibility.

When asked about the role of capital controls, Strauss Kahn said he was not wedded to any rigid ideology on the subject.

Now most media companies television, radio, publishing, games, you name it they use very rigid segmentation methods in order to understand their audiences.

Crowds are the opposite of organizations rather than being dominated by rigid hierarchies, they are often led by individuals with no formal rank.

Western European wages are far too rigid for the benefits of competition and sectoral change to be shared by a majority of workers.