GB 6675-2003 National Safety Technical Code for Toys, in which the safetylevel of toys has achieved the advanced international level, is the general standard of all kinds oftoys. It will facilitate the improvement of ...GB 6675-2003 National Safety Technical Code for Toys, in which the safetylevel of toys has achieved the advanced international level, is the general standard of all kinds oftoys. It will facilitate the improvement of the whole quality of toys and the development of toysindustry. It also improves the competitive ability of our toys in international market. It is a newlandmark of the development of toys industry in China.展开更多
Gas hydrates-the firm crystal connections formed water(water,ice,water vapor)and low-molecular waterproof natural gases(mainly methane)whose crystal structure effectively compresses gas:each cubic meter of hydrate can...Gas hydrates-the firm crystal connections formed water(water,ice,water vapor)and low-molecular waterproof natural gases(mainly methane)whose crystal structure effectively compresses gas:each cubic meter of hydrate can yield over 160 m3 of methane.In present time exploitation of the Messoyahsk(Russia)and Mallik(Canada)deposits of gas hydrates in is conducted actively.The further perfection of prospecting methods in the field of studying gas hydrates containing sediments in round extent depends on improvement of geophysical and well test research,among which native-state core drilling is one of the major.Sampling native-state core from gas hydrates sediments keeping not only original composition,but structural-textural features of their construction.Despite of appeal of use gas hydrates as the perspective and ecologically pure fuel possessing huge resources,investigation and development of their deposits can lead to a number of the negative consequences connected with arising hazards for maintenance of their technical and ecological safety of carrying out.Scales of arising problems can change from local up to regional and even global.展开更多
This paper introduced the development of Technical Safety Standards for Cosmetics(TSSC). It explained changes in TSSC in detail and put forward related suggestions for implementation.
文摘GB 6675-2003 National Safety Technical Code for Toys, in which the safetylevel of toys has achieved the advanced international level, is the general standard of all kinds oftoys. It will facilitate the improvement of the whole quality of toys and the development of toysindustry. It also improves the competitive ability of our toys in international market. It is a newlandmark of the development of toys industry in China.
文摘Gas hydrates-the firm crystal connections formed water(water,ice,water vapor)and low-molecular waterproof natural gases(mainly methane)whose crystal structure effectively compresses gas:each cubic meter of hydrate can yield over 160 m3 of methane.In present time exploitation of the Messoyahsk(Russia)and Mallik(Canada)deposits of gas hydrates in is conducted actively.The further perfection of prospecting methods in the field of studying gas hydrates containing sediments in round extent depends on improvement of geophysical and well test research,among which native-state core drilling is one of the major.Sampling native-state core from gas hydrates sediments keeping not only original composition,but structural-textural features of their construction.Despite of appeal of use gas hydrates as the perspective and ecologically pure fuel possessing huge resources,investigation and development of their deposits can lead to a number of the negative consequences connected with arising hazards for maintenance of their technical and ecological safety of carrying out.Scales of arising problems can change from local up to regional and even global.
文摘This paper introduced the development of Technical Safety Standards for Cosmetics(TSSC). It explained changes in TSSC in detail and put forward related suggestions for implementation.
