needle thread造句

• Domestic sewing machines - test on the reliability of the tension device of the needle thread
  家用缝纫机.针线拉紧器的可靠性试验
• Household sewing - machines ; testing of loss of tensile strength of needle thread by sewing
  家用缝纫机.第9部分:采用缝纫法对针线拉力强度损失的
• Turn tension nut 1 toward a to increase the needle thread tension , or toward b to decrease it
  向a的方向转动线张力螺母1之后，上线张力变强，向b的方向转动之后，上线张力则变弱。