According to the "special equipment directory", lorry crane which belongs to a hoisting machine in mobile crane, code 4490, and the hydraulic lifting platform vehicle is in crane lift type, code 4890.

根据《特种设备目录》，随车起重机属于起重机械中流动式起重机类，代码为4490，而液压升降平台车则属于起重机械中的升降机类，代码为4890。

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The lorry and its crane had been unloading six pontoons on Friday, 16 December so that a boat could be brought onto it by Ipswich company Red Seven Marine for delivery to the Olympic site in London.

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