What is the p max (bar) of the pistol with a P1 diameter of 9.70 mm?
CREATE TABLE "bolt_thrust_estimations_for_various_pist" (
  "chambering" text,
  "p1_diameter_mm" text,
  "a_external_cm_2" text,
  "p_max_bar" real,
  "f_bolt_kgf" real,
  "f_bolt" text
);
SELECT "p_max_bar" FROM "bolt_thrust_estimations_for_various_pist" WHERE "p1_diameter_mm"='9.70';