Mechanical pig includes metal body, disc and cleaning parts. The main material of the disc is artificial rubber. It plays a guiding and sealing role. The sweeping piece is made of stainless steel wire brush or artificial rubber blade. Several bypass holes are reserved at the top of the front of the pig to control the pig’s traveling speed in the pipeline.

1. Before coming to China, send a tip for vist in China to the customer. It can include advice on what to bring, weather and clothing, travel and stay safe. 2. Pay attention to the customer's ticket. The customer may not be familiar with the various holidays in China, so they do not know the urgency of the ticket in China. Help customers to check the tickets to ensure that the visit is foolproof: provide hotel suggestions to customers, inquire and recommend hotels to customers: foreign customers can let them buy from etrip.