A setting and curing accelerator for hydraulic binders comprises: Al23 aluminum sulfate, Al3 aluminum hydroxide and mineral acid in aqueous solution. The color filter photosensitive resin composition can be prepared into a color filter having uniformity, almost no residue, and high resolution due to ultrafine pixels of 1. Each die has a vee shaped surface, each face of the vee shaped surface provided with the equivalent of teeth to engage the outer surface of pipe to be gripped. 5 Alternatively, the cover can be a rotatable disk or cylinder with an opening which can be brought in line with the discharge opening of a reservoir under the action of the actuator. The memory card is inserted into the receiving space so that the extension contacts a metal portion on the memory card, with the extension electrically coupled to ground via the draining portion and the main body. The OSPCM system then forwards invoices to the voucher system for those cases where work is completed as designed.