Manufacturers of the early 1900 s were using steel pipe, angle or channel for the greenhouse superstructures.

二十世紀(jì)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(jié)構(gòu).

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(jié)構(gòu): 水上和水下船殼部位; 甲板和上層建筑; 多功能維修用涂料.

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