download assembly-type retaining wall collection

Quick answer：

The 'assembly-type retaining wall collection' refers to a set of design resources or blueprints for prefabricated retaining walls. These collections often include detailed drawings, specifications, and installation guides. To download such a collection, you would typically visit an official or reputable engineering or architecture website, or use a specialized software for construction and architecture. Make sure to check the copyright and usage rights before downloading.