为了刮蜡，刮蜡片上有一个与油管相配合的环。
The paraffin knife has a ring that fits the tubing to scrape the paraffin.
该装置具有防雨、刮蜡、双重密封等多种功能，具有很强的经济价值和实用价值。
With the functions of rainproof, paraffin scraping and dual-seal, the device has strong economical and practical value.
用于输送粘性、易结渣介质管道上的球阀应使用全通径的，方便定期的刮蜡吹扫器通过。
Used for transportation of slagging in viscosity, easy to medium pipeline ball valve full bore should be used to facilitate regular scraping wax blowing through.
应用推荐