What does API 6A mean?

What does API 6A mean? API Spec 6A is an International Standard that specifies requirements and gives recommendations for the performance, dimensional and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipment, purchasing, repair and remanufacture of wellhead and christmas tree … What is the difference between API 6A and API 6D? API […]

What classes are in subphylum Vertebrata?

What classes are in subphylum Vertebrata? Subphylum Vertebrata Class Agnatha (jawless fishes) Class Chondrichthyes (cartilaginous fishes) Class Osteichthyes (bony fishes) Class Amphibia (amphibians) Class Reptilia (reptiles) Class Aves (birds) Class Mammalia (mammals) How many classes are in the subphylum vertebrata? Vertebrata – Vertebrates Humans, birds, mammals, reptiles, amphibians, and fish are all vertebrates. There are […]

Is 4K 120Hz?

Is 4K 120Hz? In fact, no matter what number you see listed with a 4K TV, no 4K TV has a native panel refresh rate higher than 120Hz. As we’ll explain, though, a number higher than 120Hz doesn’t necessarily mean the claim is false. Refresh rate is the number time times per second (written in […]

What kind of paper is Stalogy?

What kind of paper is Stalogy? The Stalogy 365 journals are plain-looking, softcover notebooks with a black textured ‘plastic’ outside cover. A few Stalogy logo’s and their slogan “what should have been, is” adorn the top left edge of the front cover, hot-foiled in gold. It’s a fairly no-nonsense, industrial-looking product at first sight. What […]

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