更多colophony例句

1. It is valuable because tar, pitch, rosin, and colophony are obtained by distilling it.
2. Rosin, sometimes called colophony, is obtained from the sap of certain firs and pine trees.
3. The colophene hydrocarbons, formula (C20H32), represented by colophony.
4. If a thicker consistence is desired, a greater proportion of colophony is added, and it is cast in moulds.
5. Colophony, 462 has been placed in correct alphabetical order in the index.