铅

• All other metals and nonmetals lie within the boundaries of lead and diamond .
  所有其他金属和非金属都处在铅和金刚石的界限之内。
• Some manufacturers used a little fumed litharge and basic lead sulfate here also .
  有些制造厂也用少量细质的一氧化铅和碱式硫酸铝。
• Such organolead compounds are banned as petrol additives in some countries .
  这样的有机铅化合物在一些国家中是被禁止作为汽油添加剂的。
• The lead pump is usually of the simple rotary design which requires little attention .
  铅液泵通常是一个简单的旋转装置，很少需要维护。
• The silver and lead salts are highly sensitive to impact, but have no initiating properties .
  银盐和铅盐的冲击感度甚高，但无起爆性能。
• Transmission of a vertical path through the atmosphere may only be about 50% in this region .
  整层大气铅值透过率在这个光谱区可能只有50左右。
• They wanted to determine how well the leaves and roots would grow back in the presence of lead .
  他们想确定叶和根在铅存在的情况下是如何恢复的。
• The prospective battery manufacturer must choose the type of lead oxide to be used .
  一个新建立的电池制造厂如果有条件选择的话，它必须选择铅粉的类型。
• The plate lugs should be dry before they are immersed in hot liquid lead of the cast-on machine .
  在极耳被浸渍到铸焊机的热铅液中之前，极耳应是干燥的。
• To produce satisfactory lead parts, the lead alloys should meet certain material specifications .
  为能生产合格的铅零件，铅合金必须符合一定的材料规格。