재료는 앞에서도 언급한 바와 같이 대부분이 PbO로 구성되어 있는 유연 재료이다. 이 재료는 폐기될 경우, 토양을 오염시킬 가능성이 있기 때문에, 최근에는 PbO를 포함하지 않은 Bi₂O₃-SiO₂-B₂O₃-Al₂O₃, Bao-ZnO-SiO₂-B₂O₃, P₂O-ZnO-SiO₂-B₂O₃등의 무연 유리 재료(led-free glas frit)등이 개발되고 있다.
The First Vietnamese:
Historians believe that the earliest
Vietnamese people gradually moved from the Indonesian archipelago
through the Malay Peninsula and
Thailand until they settled on the
edges of the Red River in the Tonkin Delta.
Population
787,604 people (Year 1999)
Locality
Ha Giang, Tuyen Quang, Lao Cai, Yen Bai, Lai Chau, Son La, Cao Bang and Nghe An provinces.
Customs
Establishment of SEZ : encourage export, but small scale
Guangdong and Fujian province close to Hong Kong
Implement of exporting-process
Manhattan SEZ is closed to
Ho Chi Minh City that have transportation infrastructure
Phnom Penh SEZ is located in capital city
Favorable conditions to export
What is EP zone?
= Export-processing Zone.
1> Free import. Ex. Equ
Change of conductivity being
normal state and gas detecting in sno2 grain boundary
Amount of desorption and absorption of oxide and free electron
can control sensor sensitivity
Electrode and the electrolyte solution while maintaining a constant current from the direct oxidation and reduction when measuring current to detect the gas.
Cause ionization of the electrolyte solution, the