(1) Screw diameter --- the outer diameter of the screw (mm);

(2) the effective length of the screw --- the length of the screw part on the screw (mm), often expressed in L;

(3) L / D ratio of screw

(4) Screw compression ratio V2 / V1 ---- the ratio of the first screw groove volume (V2) of the screw feeding section to the last screw groove volume of the metering section (V1);

(5) Injection stroke --- the maximum distance that the screw moves, and the maximum distance (cm) when the screw moves backward;

(6) Theoretical injection volume-the product of the cross-sectional area of the head of the screw (or plug) and the maximum injection stroke (cm3);

（7） Injection volume ---- the maximum weight (g) of the PS (or screw) in order to inject PS;

(8) Injection pressure-the maximum pressure (N / m2) of pre-melted material at the head of the screw (or plug) during injection;

(9) Injection speed-the maximum speed (mm / s) of the screw (or plug) during injection;

(10) Injection time --- the minimum time for the screw (or plug) to complete the injection stroke during injection;

(11) Injection rate-the theoretical volume of injection per unit time: the cross-sectional area of the screw (or plug) multiplied by the maximum speed of the screw (or plug);

(12) Rotating speed of the screw ----- When the material is plasticized, the lowest maximum rotating speed range of the screw;

(13) Plasticizing capacity --- the maximum weight of plasticizable material per unit time (kg / h);

(14) Screw torque-the maximum torque (N / m) of screw drive when the material is plasticized;

(15) Screw driving power-the maximum power of screw driving (kw) when the material is plasticized;

(16) Recovery rate: another expression of plasticizing ability: heating with PS, above 210 degrees, with 50% of the maximum injection stroke, continuous air injection 10 times, the measured total weight divided by the total screw rotation time , Whose quotient is the response rate;

(17) Nozzle contact --- the maximum contact force between the nozzle and the mold casing (or the thrust of the injection seat kN);

(18) Nozzle extension --- the length of the mold mounting plane (mm) when the nozzle extends out of the front template;

(19) Barrel heating power --- the total power of barrel heating.