manual operation frequently
Polypropylene plant with mass polymerization has many advantages, such as less equipment and lower cost etc. , and some disadvantages, including more raw materials and assistant, batch production, manual operation frequently, higher labor intensity and poor insurance etc.
基于1个网页-相关网页
manual operation frequently
手动操作频繁
以上为机器翻译结果，长、整句建议使用 人工翻译 。