: a tool for using activity or other animals especially : one which retains by springing shut quickly（尤指为利用而）收集，存住，保存（热量、水等） A greenhouse stays heat since the glass traps the heat of the Sunshine. 温室保持着温暖，因为玻璃吸收了太阳的热量。Director BonesVision switches to night time
Ideal For: Applying concussive force to drill as a result of masonry products A hammer drill brings together rotational and concussive forces to drill as a result of several masonry resources. The rotational power of a standard drill just isn't enough to drill by rigid resources like brick and mortar, so hammer drills also have a hammering system t