This is easy to construct in a backyard workshop with welding and plate-metalengineering facilities because of it's simplicity.
这是很容易构造在与钢板 焊接和金属工程设施后院车间由于它的简单性。
2
This is easy to construct in a backyard workshop with welding and plate-metalengineering facilities because of it's simplicity.
这是很容易构造在与钢板焊接和金属工程设施后院车间由于它的简单性。
3
Due to the unique, magnesium is becoming the third-largest metalengineering materials after the steel and aluminum, known as the "21st Century Green engineering."