Abstract: Disclosed is an in-situ detoxification method for a heavily contaminated site by hexavalent chromium. The method includes injecting a chemical reducing agent into a site heavily contaminated with hexavalent chromium, and injecting a chromium soil remediation microbial agent into the site after 0-10 days. The in-situ detoxification method includes: first, in-situ injecting the chemical reducing agent into the soil, preliminarily reducing high-concentration hexavalent chromium such that the hexavalent chromium of high concentration has no toxic effect on the subsequent ecological microbial agent, then in-situ injecting the ecological microbial agent prepared from biogas residue, a carbon source and sulfate into the chromium-containing soil under pressure, and forming a large-scale reducing buffer zone containing sulfate-reducing bacteria and sulfide in a special maintenance manner in the subsurface soil of the site to reduce the hexavalent chromium continuously and effectively.

Abstract: Disclosed is an in-situ detoxification method for a heavily contaminated site by hexavalent chromium. The method includes injecting a chemical reducing agent into a site heavily contaminated with hexavalent chromium, and injecting a chromium soil remediation microbial agent into the site after 0-10 days. The in-situ detoxification method includes: first, in-situ injecting the chemical reducing agent into the soil, preliminarily reducing high-concentration hexavalent chromium such that the hexavalent chromium of high concentration has no toxic effect on the subsequent ecological microbial agent, then in-situ injecting the ecological microbial agent prepared from biogas residue, a carbon source and sulfate into the chromium-containing soil under pressure, and forming a large-scale reducing buffer zone containing sulfate-reducing bacteria and sulfide in a special maintenance manner in the subsurface soil of the site to reduce the hexavalent chromium continuously and effectively.

Abstract: An electrical connector has at least two contact assemblies spaced apart from each other by a first distance to receive corresponding one of at least two plug conductors being spaced apart from each other by a second distance. Each of the at least two contact assemblies includes a pair of contact members for contacting one corresponding plug conductor, and a clamping member configured to clamp the pair of contact members to apply a holding force onto the pair of contact members and the corresponding plug conductor. The clamping member is inserted through the pair of contact members in a direction opposite to a mating direction, and the clamping member and the pair of contact members are adapted to swing in a direction substantially perpendicular to the mating direction in order to compensate for a difference between the first and second distances.

Abstract: An electrical connector has at least two contact assemblies spaced apart from each other by a first distance to receive corresponding one of at least two plug conductors being spaced apart from each other by a second distance. Each of the at least two contact assemblies includes a pair of contact members for contacting one corresponding plug conductor, and a clamping member configured to clamp the pair of contact members to apply a holding force onto the pair of contact members and the corresponding plug conductor. The clamping member is inserted through the pair of contact members in a direction opposite to a mating direction, and the clamping member and the pair of contact members are adapted to swing in a direction substantially perpendicular to the mating direction in order to compensate for a difference between the first and second distances.

Abstract: An electrical connector assembly is provided for mounting on a printed circuit board. The assembly includes a housing having a front mating face, a rear face and a board mounting face. A plurality of terminals are mounted on the housing and include contact portions extending toward the front mating face and tail portions extending at an angle to the contact portions for connection to the printed circuit board. A tail aligner is mounted on the tail portions of the terminals and is free of the housing spaced rearwardly of the rear face thereof. A cover at least partially encloses the rear face of the housing and the tail portions of the terminals. The cover is secured to the housing and is latched to the tail aligning device.