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Title | The date | Reading times | |||||
Technical Support | Age of Plastics | 2015-05-07 | 36 | |||||
Plastic is a material consisting of any of a wide range of synthetic or semi-synthetic organics that aremalleable and can be molded into solid objects of diverse shapes. Plastics are typically organic... | |||||||
Technical Support | The history of the nail | 2015-05-07 | 41 | |||||
The history of the nail is divided roughly into three distinct periods:
the period of the hand-wrought (forged) nail (pre-history until 19th century) the period of the cut nail (roughly 1800... | |||||||
Technical Support | Nail (fastener) | 2015-05-07 | 25 | |||||
In woodworking and construction, a nail is a pin-shaped object of metal (or wood, called a treenail or "trunnel") which is used as a fastener, as a peg to hang something, or sometimes as a decoration.... | |||||||
Technical Support | Mechanical classifications | 2015-05-07 | 29 | |||||
The numbers stamped on the head of the bolt are referred to the grade of the bolt used in certain application with the strength of a bolt. High-strength steel bolts usually have a hexagonal head with ... | |||||||
Technical Support | Materials | 2015-05-07 | 23 | |||||
Materials may be grouped in several ways. Scientists often classify
materials by their state: solid, liquid, or gas. They also separate them into <... | |||||||
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