A forming method for fiber reinforced resin includes the following steps. The collar may also include a securing member capable of substantially covering the anterior opening and at least one pressure member. The method includes the step of allowing a passivation layer to build up on the conductive surfaceThe method includes the step of applying an external influence to the conductive surface to periodically reduce the passivation layer thickness. At least a portion of the pilot valve is exposed to motive fluid, and the portion of the pilot valve exposed to motive fluid includes surface areas giving rise to a net zero actuating force arising from pressure of the motive fluid. It optionally includes a second cleaning stage during which the level of the liquid is higher than the level of the content of the stirring member. The degassing space is sealed by the degassing block and the first and second sealing members, and the area between the degassing block and the container end surface is sealed by a metal touch.