Table standing luminaire for orientable direct task, low voltage, halogen lighting.

制底座，灯身和灯臂，黑色环外涂层。

It provides orientable halogen task lighting, and its elegant counterweight and arm system keep the head constantly parallel to the table.

它提供了定向卤素工作照明，其优雅姿势和手臂系统保持头部不断平行。

Pyridine can react with halogens,nitronium fluoroborate, sulfur trioxide, boranes and chromium trioxide to form some useful organic reagents which are introduced briefly in the paper.

吡啶可以和卤素、硝基四氟硼盐、硫、硼烷及铬反应，形成一些有用有机试剂。

Which indubitably indicate that the bismuthous sulfide can only dissolve in halogen acid except hydrofluoric acid, the mixed solution of dilute sulfuric acid and alkali halide.

结果表明硫铋只能溶于氢卤酸（除氢氟酸外）、稀硫酸与碱金属卤物混合液中，不能溶于稀硫酸中。