烟箱装牢角铁

[机] smoke box fastening angle

yān xiāng zhuāng láo jiǎo tiě ㄧㄢ ㄒㄧㄤ ㄓㄨㄤ ㄌㄠˊ ㄐㄧㄠˇ ㄊㄧㄝˇ