The invention relates to a method for manufacturing an optoelectronic device comprising: a step for manufacturing optical guiding means; a step for assembling these means with electronic circuit means and generating optically active means on top of this assembly. The invention also includes inserting third party account information into an encrypted portion of the payment request, so the payment request appears as a normal request to the issuing bank, but the third party account information may be used by the third party to bill the customer. 00001 grams per gram of crude feed. The electrical connector minimizes signal skew by maintaining substantially equal-length transmission paths within the connector through varying the lengths and positions of plug and receptacle contacts. The apparatus includes a preconcentration tube for concentrating chemicals of interest from the sample, and a sample switching valve and sampling pump to switch the sample flow from concentrating sample to delivering concentrated sample. Where the cutting device is a chain cutter, the boom projects forwardly and downwardly relative to the direction of cutting the trench, and drive unit arranged to drive the chain in a direction to carry the cutting elements upwardly around the distal end of the boom and rearwardly along the upper run of the endless chain cutter.