配方类型:

ELEMENTARY Preparations

配方说明:

lubricants, in the form of oils or greases, are usd to prevent
friction and wearing of parts which are rubbed together. lubricants
must be chosen to fit specific uses. they consist of oils and fats
often compounded with soaps and other uncuous substances. for heavy
duty, heavy oils or greases are used and light oils are suitable for
light duty.

配方组成:

white petrolatum/15 oz
acid-free bone oil/5 oz
gum lubricnt

配制方法:

warm gently and mix together.