±æÀÌ ¹× Æ÷Àå´ÜÀ§ ¿É¼Ç ¼±Åà 5/8(15.8mm)/20°³ 3/4(19mm)/20°³ 1inch(25.4mm)/20°³ 1-1/2(38.1mm)/10°³ 2inch(50.8mm)/10°³