orifice,
Orifice, bell mouth - 鐘形孔口Orifice, box - 方形孔口Orifice, circular - 圓形孔口Orifice, diaphragm - 隔膜孔口Orifice, elliptical - 橢圓孔口Orifice, end cap - 端帽式孔口Orifice, frictionless - 無摩擦孔口Orifice, inclined - 斜孔口Orifice, partially submerged - 局部潛孔口Orifice, pipe - 管形孔口Orifice, rectangular - 矩形孔口Orifice, reentrant - 凹形孔口Orifice, rounded - 圓緣孔口Orifice, sharp edged - 銳緣孔口Orifice, sharp edged diaphragm - 銳緣隔膜孔口Orifice, short pipe - 短管孔口Orifice, square - 方孔口Orifice, square edged - 方緣孔口Orifice, standard - 標準孔口Orifice, submerged - 潛孔口Orifice, triangular - 三角形孔口Orifice, vertical - 垂直孔口
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