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Quallity control

Control and inspect whole production process strictly, every part and each tool is traceable and in serial.  Simple description is as following:

1. Quality control of steel material. Select good mill factory, third test center for steel sample testing.

2. O-rings and Backup seals are all 100% visual and dimensional  inspection.

3. Spare parts production control, QC inspection after each production process; high requirements of Heat treatment or Surface treatment inspection.

4. Tool Assembly and test process, QC is inherent with foreign company’s requirements.