halogens

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

钢制底座，灯身和灯臂，氧涂层。

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，其优雅的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、硝基四化硼盐、三氧化、硼烷及三氧化铬反应，形成一些有用的有机试剂。

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.

结果表明化铋只能溶于氢卤酸（除氢酸）、酸与碱金属卤化物的混合液中，不能溶于酸中。