By cooling modified pitch with water, solid pitch is obtained, which should be transported in bulk by trucks or by cargo train .It is in the category of dangerous product stipulated by the Ministry of Transportation.
详情正文
登录后查看完整内容
使用 DeepEvidence / 梅斯账号登录，新用户可在登录页面注册。
登录 / 注册登录成功后将返回当前页面，继续浏览。