An inkjet printing system includes an array of transducers to eject ink, the array including the transducers divided into interspersed sets. The main body has an accommodation room defined by a first wall, a second wall, a third wall and a fourth wall, wherein the first wall faces the third wall and connects with the second and fourth walls. An outer sleeve is disposed external to the window structure, so that the sleeve overlies the window. Each of the query key terms are associated with information, including use of the word and a grammatical role of the word. The process preferably uses vegetable oils and is specifically configured for producing biodiesel from castor oil. A transition section of the outer peripheral sealing surface connects between a primary section and a secondary section, which are located in two different planes, respectively, and the plane of the secondary section is the same as a plane of a boundary portion sealing surface held between two tube connecting surfaces in the core plate.