In the third or fourth tier cities or small county towns, it's presumptuous for everyone to use more clothes than in the past, for example, to support bamboo poles to dry clothes, or to make several rebars on balconies to dry clothes, and to hang directly on the railings. Nowadays, lar.......

In recent years, the exposure rate of poison track events has continued to increase. This has led us to pay more and more attention to the floors laid by kindergartens, and poisons have escalated into children’s bodies. The trust of suspended floors has become a crisis in the publicâ€.......

Oxygen Absence and Its Elimination in Research and Trial Manufacture of PMN-PT Ceramics Zhu Weimin, Li Cheng'en, Zhou Jiaguang, Li Yi (Shanghai Lianneng Science and Technology Co., Ltd., Shanghai 200233, found that the stoichiometric composition (F1) of Pb:Mgi/3NbM ) 0.65Ti0.353 ceram.......