These are from the "Frugal Gourmet on our Immigrant Ancestors".....an excellent cookbook btw.
Mix the cucumbers with the salt. Place in colander, and let drain for about 45 minutes. Rinse the cucumbers and drain well. Mix with the crab. Make a dressing of the light soy sauce, vinegar, oil and sugar. Toss with crab and drained cucumber, and serve.