Walnut shell material of high quality walnut shell as raw material, crushing, polishing, steam cleaning, drug preservativetreatment, two filter processed.
核桃壳滤料采用优质山核桃壳为原料，经过破碎、抛光、蒸洗、药物防腐处理，两次筛选加工而成。
2
This preservative has given excellent performance as a treatment for transmission poles.
这种防腐剂作为通讯电杆的处理剂具有很好的性能。
3
The treatment was found to have a negligible preservative effect.