タイトルまたは説明

Science and technology are the primary productive forces. There is no doubt that a new expansion ladder was born in this way. This expansion ladder belongs to a heavy engineering ladder, with a length of 4 to *2 meters. The double-sided expansion ladder has eight feet, including four movable feet (which can also be used in narrow spaces). When the feet are spread, it can be used independently without relying on anything. The hand pull expansion ladder is convenient and fast, because the birth of this engineering expansion ladder, The construction in the middle of the ceiling of the hotel lobby/the replacement of street lamps at the roadside saves the tedious steps of scaffolding and reduces the labor cost and construction time.