You can purchase heel lifts in the foot section of many drugstores, or try using a makeup sponge as a substitute. You'll probably notice an immediate difference.
Pipe wrenches should be inspected regularly. Replace the heel and jaw section if found to be defective or worn out.
应当定期检查管钳，更换已磨损或有伤痕的钳牙及牙床。
3
Having this information allowed KOC to focus the treatment, using coiled tubing to spot acid along the middle section while leaving the toe and heel untouched.