Thickened angle iron - old classic style - elbow style [multi-purpose - more resistant to burning]
Thickened angle iron - old classic style - elbow style + fire hook and fire shovel
Thickened angle iron - old classic style - elbow style + 2m smoke pipe + 1 elbow + fire hook and shovel
Thickened angle iron - old classic style - elbow style + 4m smoke pipe + 1 elbow + fire hook and shovel
Thickened angle iron - old classic style - elbow style + 6m smoke pipe + 1 elbow + fire hook and shovel
Thickened angle iron - old classic style - straight head style + fire hook and fire shovel
Thickened angle iron - old-fashioned classic style - straight head style [can pass through the kang - very resistant to burning]
Thickened angle iron - old classic style - straight head + 2m smoke pipe + 2 elbows + fire hook and shovel
Thickened angle iron - old classic style - straight head + 4m smoke pipe + 2 elbows + fire hook and shovel
Thickened angle iron - old classic style - straight head + 6m smoke pipe + 2 elbows + fire hook and shovel
Thickening and adding materials - stable and good sealing - upgraded square box model - elbow model + fire hook and fire shovel
Thickened and thickened - stable and well sealed - upgraded square box model - elbow model [multi-purpose - more resistant to burning]
Thickened and thickened - stable and well sealed - upgraded square box model - elbow model + 2m smoke pipe + 1 elbow + fire hook and shovel
Thickened and thickened - stable and well sealed - upgraded square box model - elbow model + 4m smoke pipe + 1 elbow + fire hook and shovel
Thickened and thickened - stable and well sealed - upgraded square box model - elbow model + 6m smoke pipe + 1 elbow + fire hook and shovel
Thickening and adding materials - stable and good sealing - upgraded square box style - straight head style + fire hook and fire shovel
Thickened and thickened - stable and well sealed - upgraded square box style - straight head style [can pass through the kang - very resistant to burning]
Thickened and thickened - stable and well sealed - upgraded square box style - straight head style + 2m smoke pipes + 2 elbows + fire hook and shovel
Thickened and thickened - stable and well sealed - upgraded square box style - straight head style + 4m smoke pipes + 2 elbows + fire hook and shovel
Thickened and thickened - stable and well sealed - upgraded square box style - straight head style + 6m smoke pipes + 2 elbows + fire hook and shovel
