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

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

noun

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

Synonym: shacklebondhamper

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

3. an adjustable pothook set in a fireplace

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

Synonym: trammel net