Manufacturers of the early 1900 s were using steel pipe, angle or channel for the greenhouse superstructures.
二十世紀初期制造商們就已用鋼管 、 角鐵以及槽鋼之類的材料建造溫室的上部結構.
辭典例句
Ships, Offshore and Marine Strutures : Above and below - water hull areas; Decks and superstructures; Multi - purpose repair coating.
船舶 、 海上和船舶結構: 水上和水下船殼部位; 甲板和上層建筑; 多功能維修用涂料.
互聯網