奥尔德林当时使用的是毡制粗头笔，它的尖头是不导电的，接触开关不会造成短路或引发火花。
Aldrin relied on a felt-tip marker, since the non-conductive tip would close the contact without shorting it out, or causing a spark.
有时候，他们还会给自己搭配一顶帽子，帽子的材料多为毡制或者皮质的，造型也分为好几种。
Sometimes they wear a hat which is made by felt or fur with various patterns.
漏涂仪显示的漏涂区域用粉笔或毡制粗头笔标识。
Holidays indicated by the detector shall be marked with chalk or felt-tip marker to identify the area to be repaired.
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