It consists of one or more wooden planks and is supported by either a timber or a tubular steel or aluminum frame; Bamboo is used in parts of Asia. Scaffolding may be raised and lowered by means of cables controlled by a ratchet or electric motor.是什么意思_It consists of one or more wooden planks and is supported by either a timber or a tubular steel or aluminum frame; Bamboo is used in parts of Asia. Scaffolding may be raised and lowered by means of cables controlled by a ratchet or electric motor.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句