TRIANGULAR SECTION HORIZONTAL PLATFORM STRUCTURE HAUJ LWM
Khoom taw qhia
Lub dai ntaiv tuaj yeem siv tau rau kaum ntauwd dai cov haujlwm, thiab lwm yam. Thaum dai tus ntaiv horizontally, ib kawg ntawm tus ntaiv yog dai rau ntawm tus ntoo khaub lig caj npab lub kaum sab xis hlau, thiab lwm qhov kawg ntawm tus ntaiv yog dai rau ntawm cov hlau.Cov ladders kuj tseem siv tau vertically.
Sau koj cov lus ntawm no thiab xa tuaj rau peb