The design and experiment of a small fire tube economic crop desiccator were studied in this paper.

论述了小型火管式经济作物干燥机的研制过程和试验研究项目。

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The main equipment such as stainless steel converter, fire tube boiler, main blower and concentrated acid pumps were made at home.

主要设备，如不锈钢转化器、火管锅炉、主鼓风机、浓硫酸泵等均为国产。

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DZL horizontal automatic chain type coal-fired steam boiler for horizontal packaged water fire tube boiler, refrigerant natural circulation.

DZL卧式自动链条燃煤、燃生物质蒸汽锅炉型式为卧式快装水火管锅炉、工质自然循环。

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The cause of the crash is still being investigated but is believed the balloon had been in the process of landing when a landing cable got caught around a gas tube and a fire erupted on board.

BBC: Egypt hot air balloon tragedy: Tributes paid to victims

According to initial indications, the balloon was in the process of landing after 7 a.m. when a cable got caught around a helium tube and a fire erupted, according to an investigator with the state prosecutor's office.

NPR: Fiery Balloon Accident Kills 19 Tourists In Egypt

An investigator with the state prosecutor's office told the Associated Press that the balloon had been landing at about 07:00 (05:00 GMT) when a landing cable got caught around a tube and a fire broke out on board.

BBC: Egypt balloon crash: Two Britons and UK resident die