unsuitable material meaning in Chinese

不适合的物料
不适用物料

Mal - conditions , unsuitable material chosen , too heavy production load , inferior quality of manufacture and irrational structure are the main causes for corrosion to occur in the secondary evaporator - heater
摘要工况恶劣、选材不当、生产负荷偏大、制造质量不佳和结构不合理是造成二段蒸发加热器发生腐蚀的主要原因。
6 if , during the warranty period specified in clause 14 and as a result of inspection by the administration or otherwise , it is found that the quality or specifications of the goods are not in conformity with the contract or if the goods are proven to be defective for any reason , including latent defects or the use of unsuitable materials , the buyer shall promptly notify the seller of the existence of a claim
如果在合同条款第14条规定的保证期内，根据检验检疫局的检验结果，发现货物的质量或规格与合同要求不符，或货物被证实有缺陷，包括潜在的缺陷或使用不合适的材料，买方应及时向卖方提出索赔。