Essay频道,Shanghai Bocast Fastener Co.,Ltd

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

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

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

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

Materials may be grouped in several ways. Scientists often classify

materials

their

state:

solid,

liquid,

gas.

They

also

separate