lower-middle classes lower-middle class lower middle class lower middle-class lower-middle classes Lower middle class Lower middle class lower middle class lower-middle class English lower middle-class lower middle class lower-middle-class lower middle class Lower middle class http://en.wikipedia.org/wiki/Lower_middle_class Lower middle class lower middle class English Lower middle class Lower middle class ( ชนชั้นกลางระดับล่าง ) lower middle class lower middle class lower middle class lower middle class lower middle class lower middle class