这就如同牵引一个工具一样。
除非狗已经进展到触垫子训练和学习位置，否则人们一开始进行这项训练时不该把牵引带当作纠正工具使用。
When people first start this work they should NEVER use the leash as a tool to correct until after the dog has progressed to through touch pads and learning positions.
因此，该系统将成为铁路运营及牵引供电系统设计有利的计算机辅助设计工具。
Therefore, the system will be an advantageous computer-aided design tool for railway operation and designing the traction power supply system.
拖吊车，救援车：修复或救助失事船只的人、交通工具或装置，尤指一种装有升降机和牵引装置的卡车，用来拖拉报废或毁坏了的交通工具。
A person, vehicle, or piece of equipment employed in recovering or removing wrecks, especially a truck with a hoist and towing apparatus used in towing disabled or wrecked vehicles.
牵引车是一种用于起重机的工具。
计算结果表明，该工具产生的牵引力与套管在水平井垂直段的自重配合所能下入的套管长度几乎满足所有水平井的位移要求。
We knowed according the computation result that the length of casing was pulling by the tool could meet the displacement requirement of the most horizontal wells.
1937年的今天，加拿大人约瑟夫-阿曼德·邦巴迪尔发明的用于雪上交通工具的锯齿轮牵引系统获得专利。
1937 - Joseph-Armand Bombardier of Canada receives patent for sprocket and track traction system used in snow vehicles.
1937年的今天，加拿大人约瑟夫-阿曼德·邦巴迪尔发明的用于雪上交通工具的锯齿轮牵引系统获得专利。
1937 - Joseph-Armand Bombardier of Canada receives patent for sprocket and track traction system used in snow vehicles.
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