The camellia gray spot is an important epidemic disease.
山茶灰斑病是严重影响山茶观赏价值的重要病害。
Some opinions about brittle fracture, gray spot and impurities in the weld are proposed.
对焊缝缺陷脆性断口、灰斑、夹杂物提出了见解。
Some opinions about brittle fracture, gray spot and impurities in the weld are proposed.
对焊缝缺陷脆性断口、灰斑、夹杂物提出了见解。
应用推荐