For the Hydraulic Manifold Block with porous system like cranial nerve, after made samples successfully, They have a special hydraulic manifold block, which includes 13 groups of M32 threaded holes, and all of them are stepped holes. At the same time, there are cross holes, straight holes, and bypass holes. The hole size is required to be more than 8. Compared with the hydraulic manifold blocks with 10 groups of normal threaded straight holes, it is not only complex in structure, but also 20% higher in precision. Arno knew that it was difficult, so he arranged 3 hydraulic manifold block manufacturers for proofing, which lasted 60 days, but all of them failed to meet the standard. This is a test order of hydraulic manifold block from an old customer. Arno wants to struggle again. Due to time constraints, he does not dare to use a new hydraulic manifold block manufacturer. His old hydraulic manifold block supplier is also unreliable. This makes , who has eight years of procurement experience, a little overwhelmed. I had a hunch that this hydraulic manifold block was not simple. Because the PO of hydraulic manifold blocks given to me by is a challenge every time. engineers pondered over the drawing of hydraulic manifold block sent by , and it is really difficult to process, with very high precision. There are not only many pore systems, but also many deep holes, more than 20 groups of 4 deep holes, with a length diameter ratio greater than 25. For M32 threaded holes of stepped holes, the coaxiality between holes is required to be 0.02mm, and the coaxiality between threads and holes is required to be 0.045mm. This complex pore system structure is like the distribution of the nervous system of the human brain. Doctors without more than 10 years of experience in brain surgery may not be confident to operate on the operating table. technical team, after 3 days of internal research and discussion, the plan has been worked out, and our chief engineer will handle the knife, starting from the production drawing of the hydraulic manifold block. However, I replied to that was only 90% sure that the sample of this hydraulic manifold block was successful, and the cost was not low. Maybe hesitated and didn't give any reply for 3 days. On the fifth day, received the development fee paid by him.