Hammer is described as an instrument for driving nails, beating metals, and the like, consisting of a head, usually of steel or iron, fixed crosswise to a handle. The hammer usually has a curved claw used to extract nails.

Height computer is characterized as a calculating device for converting indicated to true height by taking the density factor into consideration.

Heading refers to the direction toward which an aircraft,boat or ocean vessel is oriented or is pointing at a given moment. A heading may be with reference to true north or magnetic north. The heading and course may be different, especially in air navigation, because of drift.

Hardwoods are referring to trees that lose their leave in winter. It is a description applied to woods from deciduous broad-leafed trees (Angiosperms).

Headgear is defined as a Strap worn around the back of the head which is used to help pull the teeth back or influence the jaw growth. 

Hickory is characterized as a strong, open-grained hardwood known for wide variation of color and texture. Works well to express the beauty and character aspects of real wood. A unique, wilder wood with beautiful, active textures that range from light to mid to dark to gray tones.

The latest version of the Harmonized System (HS) and Codes adopted by the United States is published by the U.S. International Trade Commission (ITC) as the Harmonized Tariff Schedule of the United States. You can use this guide to determine the numerical code assigned to a particular commodity; the descriptive passages can be helpful to determine the context of a particular commodity within classification.

Hard rubber concerns the material used for pen barrels, caps, and other parts of the pen. The rubber is derived from natural latex resin, vulcanized - boiled with sulfur or other reagents to form a solid, resilient, lightweight plastic-like material that can be machined into shape,

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