例文
- An effective pre and post weld heat treatment is vital.
- Post weld heat treatment is used to control the more significant problem of the transformation of the substrate to un-tempered martensitic structure during the process.
- Dry hyperbaric welding is used in preference to wet underwater welding when high quality welds are required because of the increased control over conditions which can be exerted, such as through application of prior and post weld heat treatments.
