As exactly as the title suggests. A description of what pitch is and how to manipulate the numbers when framing and planning a project. Carpentry is mostly breaking down the elements of a building into simple shapes, making it easier to understand.
website:https://www.jhmindustry.com/
Shanghai Jian & Mei Industry and Trade Co., Ltd. is the company which manufacture and export fasteners and metal hardware, founded in 2006, with import-export authority. Now, 80% products export to all over the world and 20% sell in domestic market.