duplex boiler

space

U+0020

latin small letter b

U+0062

latin small letter d

U+0064

latin small letter e

U+0065

latin small letter i

U+0069

latin small letter l

U+006C

latin small letter o

U+006F

latin small letter p

U+0070

latin small letter r

U+0072

latin small letter u

U+0075

latin small letter x

U+0078