acetylene by dry process的用法和样例：
- The denitration by dry process were investigated from the view of governing technology.
- The chemical reaction principle and the process of preparing iron oxide red by dry process were introduced.
- The samples were digested by dry process and wet process separately,and extracted by nitric acid.
- The Pueraria lobata starch was used as raw material to synthesize starch phosphoester by dry process.