1. a fishing net with three layers; the outer two are coarse mesh and the loose inner layer is fine mesh

2. an adjustable pothook set in a fireplace

3. a restraint that is used to teach a horse to amble

4. a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner)

1. catch in or as if in a trap;

   "The men trap foxes"
   

2. place limits on (extent or access);

   "restrict the use of this parking lot"
   "limit the time you can spend with your friends"
   

1. 梁规：模锻法;锤锻法;冲锻法 drop forging | 梁规trammel | 欧姆定律 Ohm's Law

2. 拘束, 阻碍物, 束缚物：train 串,列,系列;链;列车 |trammel 拘束, 阻碍物, 束缚物 | transformer变压器

3.

3. 束缚：trammel net 鱼网 |trammel 束缚 | tramontane 野蛮的

4.

4. 椭圆量规：trammel net 三重刺网 |trammel 椭圆量规 | tramper 夯实器