ʻO ke kila Q345 kahi pā kūikawā no ka moku kaomi me ka ikaika o 345MPa.Loaʻa iā ia nā waiwai mechanical piha maikaʻi a me nā waiwai ʻenehana.Hoʻohana nui ʻia no ka hoʻohana ʻana i nā moku kaomi, no nā kumu, ka mahana, ka pale ʻana i ka corrosion, pono ke koho ʻia ka ipu ipu, ʻaʻole like.