Pamsika wamakono wopikisana kwambiri, maudindo ndi maudindo a ogula ma valve aku China asintha kwambiri. Sakungogulanso ma valve, koma akhala gawo lofunika kwambiri pamagulu ogulitsa, akusewera maudindo angapo monga opanga zisankho, ogwirizanitsa, ndi oyang'anira khalidwe. Nkhaniyi ifotokoza za udindo ndi udindo wa ogula ma valve aku China kuchokera kuzinthu zotsatirazi.